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Difference between bronchi and bronchioles histology

Difference Between Bronchi and Bronchioles Definition

Bronchi and Bronchioles - Anatomy & Physiology - WikiVet

  1. B. Bronchioles: Bronchioles [example] are smaller branches of the bronchi, and are distinguished from them by the absence of cartilage and glands
  2. al bronchioles. When the bronchi enter the lung, the C-shaped cartilages that characterize the trachea and primary bronchi are replaced by irregular plates or cartilage that completely surround the cylindrical muscular airway tube
  3. Bronchioles lack cartilage and glands which, along with their smaller size, distinguish them histologically from bronchi
  4. Anatomy. A bronchus, which is also known as a main or primary bronchus, represents the airway in the respiratory tract that conducts air into the lungs.Bronchi will branch into smaller tubes that become bronchioles.. The trachea (windpipe) is found inferior to the thyroid cartilage and superior to division into the left and right main bronchus. The trachea divides into the left and right main.
  5. These bronchioles also have simple cuboidal epithelium with more Clara cells and some ciliated cells, but the difference is that they have thinner walls and now contain a small number of alveoli in their walls. Each respiratory bronchiole then branches further into alveolar ducts. Alveolar ducts are linear airways that have multiple alveoli.
  6. al bronchiole. 1.Remove particulates. 2. warm/cool/humidify air. NO GASEOUS EXCHANGE HERE. Describe the epithelium of the conducting portion. Respiratory epithelium = ciliated pseudostratified columnar with goblet cells. Glands are in the la
  7. al bronchiole is the last order of airway that is purely involved in conducting respiratory gases. After that, any order of structure will be involved in gas exchange to a d..
Difference Between Trachea and Bronchi - Pediaa

Difference Between Bronchi and Bronchioles - Difference Wik

The bronchioles, which are direct continuations of the cartilaginous airways, end in terminal bronchioles that are approximately 0.06 cm in diameter. The chief difference between the membranous airways and the bronchi is the absence of the fibrocartilage framework and the secretory glands The bronchi (or bronchus) are the air passages into the lungs that begin at the end of the trachea. The bronchioles or bronchioli are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lungs, in which branches no longer contain cartilage or glands in their sub-mucosa. Click to see full answe During an asthma attack smooth muscles located in the bronchioles of the lung constrict and decrease the flow of air in the airways. The amount of air flow can further be decreased by inflammation or excess mucus secretion. Review Date 3/25/2020. Updated by: Charles I. Schwartz MD, FAAP, Clinical Assistant Professor of Pediatrics, Perelman.

What are the differences of bronchi and bronchioles and

Human segmental bronchi, which by definition contain cartilage, undergo branching into primary bronchioles lacking cartilage. Within the pulmonary lobe, the primary bronchioles subdivide into terminal bronchioles, which in turn divide into multiple respiratory bronchioles ().The respiratory bronchioles supply the smallest anatomic unit of the lung, the pulmonary lobule As nouns the difference between trachea and epiglottis. is that trachea is (anatomy) a thin-walled, cartilaginous tube connecting the larynx to the bronchi; the windpipe while epiglottis is (anatomy) a cartilaginous organ in the throat of terrestrial vertebrates covering the glottis when swallowing to prevent food and liquid from entering the. Difference Between Bronchi and Bronchioles - Difference Wik . I bronchi rappresentano le vie aeree contigue alla trachea, la quale - nell'adulto - si biforca a livello della 4a-5a vertebra toracica per dare origine ai due bronchi primari o principali, uno per il polmone.. Bronchi-Shield III A. Bronchi The trachea bifurcates into two primary bronchi, which enter the lung and then branch several times to give rise to smaller secondary and tertiary bronchi View Image. Bronchi differ from the trachea in having plates rather than rings of cartilage, and in having a layer of smooth muscle between the lamina propria and submucosa

Thereof, what is the difference between bronchi and bronchioles? The bronchi (or bronchus ) are the air passages into the lungs that begin at the end of the trachea. The bronchioles or bronchioli are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lungs, in which branches no longer contain. * These and subsequent bronchi undergo repeated branching culminating in the formation of bronchioles. b. Large intrapulmonary bronchi are histologically similar to the trachea and primary bronchi. c. Differences in the histology develop as the bronchi become smaller. * Cartilage rings are reduced to irregular plates of cartilage Bronchi, Bronchial Tree, & Lungs Bronchi and Bronchial Tree. In the mediastinum, at the level of the fifth thoracic vertebra, the trachea divides into the right and left primary bronchi.The bronchi branch into smaller and smaller passageways until they terminate in tiny air sacs called alveoli.. The cartilage and mucous membrane of the primary bronchi are similar to that in the trachea

A. Bronchi: The trachea bifurcates into two primary bronchi, which enter the lung and then branch several times to give rise to smaller secondary and tertiary bronchi . Bronchi differ from the trachea in having plates rather than rings of cartilage, and in having a layer of smooth muscle between the lamina propria and submucosa The tertiary bronchi continue to divide into small bronchioles where the first change in histology takes place as cartilage is no longer present in the bronchioles. The end of the conduction portion of the lungs is at the final segment called the terminal bronchioles. The terminal bronchioles open into the respiratory bronchioles . This is the. The difference between the bronchi and the bronchioles is that the bronchi functions as the air passages into the lung that begins at the end of the trachea. The bronchioles function as the passageways in which air passes through the nose or mouth into the air sacs where the gas exchange occurs

General diameters of the downstream airways include lobular and segmental bronchi (5-8mm), subsegmental bronchi and bronchiole (1.5-3mm), lobular bronchiole (1mm), terminal bronchiole (.7mm) and acinar bronchiole (.5mm). (Webb Muller Naidich)The acinus is about 7-15 mms in diameter. From the lobular bronchus there are 9 to 14 11 Respiratory system . The exchange of gases, such as carbon dioxide and oxygen, between the air and blood takes place in the lungs.In the alveoli, balloon-like structures in the lungs, gases diffuse between the inside and outside of the body by the process of simple diffusion, based on concentration gradient.A system of air passages brings the air to the respiratory membrane in the alveoli Intrapulmonary bronchi- secondary and tertiary bronchi; Bronchioles- terminal and respiratory bronchioles; Alveolar duct; Alveolar sac; Alveoli; What are the differences between trachea, extra pulmonary bronchus and intra pulmonary bronchus; Refer the table below; What are the differences between bronchus and bronchiole? Refer the table belo

histology, review4 answer: pulmonary artery, pulmonary vein, systemic arteries, respiratory tree, bronchi, bronchioles. SLIDE #2. Lung, 15x. How can you tell the difference between a pulmonary artery and a pulmonary vein? ANSWER 01.3 Reapiratory System Histology Flashcards Preview Respiratory System > 01.3 Reapiratory System Histology > Flashcards Flashcards in 01.3 Reapiratory System Respiratory bronchioles to the alveoli. 2 What are two structural differences between bronchi and bronchioles? Bronchial walls contain cartilage Bronchi contains submucosal glands.

Duke Histology - Respiratory Syste

Transcribed image text: LABEL THESE STRUCTURES OF THE BRONCHIAL TREE WORD BANK alveoli arteriole capillaries respiratory bronchioles smooth muscle venule MICROANATOMY AND HISTOLOGY Use your textbook to help you complete the following chart to help you remember the differences between different structures. For supporting tissues indicate whether the organ has cartilage (and its shape) or. The alveoli and bronchi are two of the lungs' main components that play important roles in the breathing process. Alveoli is the plural term for alveolus.. An alveolus is a tiny, air sac which is found at the tip of the smallest tube airways called bronchioles. Bronchi is the plural term for bronchus. The bronchioles differ from the structure of the bronchi in that they do not contain any cartilage at all. The presence of smooth muscles and elastin allow the smaller bronchi and bronchioles to be more flexible and contractile. The main function of the bronchi and bronchioles is to carry air from the trachea into the lungs Mar 16, 2020 - What is the difference between Bronchi and Bronchioles? Bronchi is the tubules that form the main passageway of air into lungs. Bronchi form bronchioles.. Histologic features distinguishing bronchi from bronchioles a) Bronchioles are lined by ciliated epithelium b) Bronchioles lack cartilage and submucosal glands c) Only bronchioles are intrapulmonary d) Only bronchi have smooth muscle in their walls e) Only bronchi are derived from the primitive laryngotracheal tube or bu

The junction between the trachea and the bronchi begins at the level of the fifth thoracic verterbra. At the bottom of the trachea is a ridge of cartilage called the carina. The carina essentially divides into the two primary bronchi; the right bronchi travels into the right lung and the left one to the left lung Bronchi were surrounded by segments of cartilage. Distal bronchioles had a simple cuboidal/columnar epithelium with club (Clara) cells, lacked cartilaginous tissue in their walls and had a complete smooth muscle layer. These results revealed histomorphological differences between the ICP and other rodents F. BRONCHIOLES-- In the lobes of the lung the primary bronchi divide into several (5) short secondary bronchi, which in turn divide to form bronchioles (10 on the right and 9 on the left). The bronchioles are distributed within the right (3) and left (2) lobes of the lung

Bronchioles (terminal and respiratory bronchioles). iii. Alveolar ducts, alveolar sacs & alveoli. Q. Describe the microscopic structure of intrapulmonary bronchus. A. Intrapulmonary bronchus wall has the same layers as in trachea with few differences which are as follows The bronchi function to carry air that is breathed in through to the functional tissues of the lungs, called alveoli.Exchange of gases between the air in the lungs and the blood in the capillaries occurs across the walls of the alveolar ducts and alveoli. The alveolar ducts and alveoli consist primarily of simple squamous epithelium, which permits rapid diffusion of oxygen and carbon dioxide

Veterinary pathologist here. I would think the biggest difference between the two techniques would be the orientation and cross sectional diameter of the bronchi and bronchioles. Otherwise, the structures in the lung parenchyma are pretty much indistinguishable/similar between the two Bronchioles are smaller branches of the bronchi How do the bronchioles differ from BIO 202 at Pikes Peak Community Colleg The wall of the intrapulmonary bronchus is surrounded by several layers of smooth muscles that replace the cartilaginous plates (Fig 6). The intrapulmonary bronchus further divides into few segmental bronchi before it ends into a few terminal bronchioles (Fig. 3 and 8) -Bronchioles are smaller in diameter, no cartilage, as soon as you see this you know you are viewing the bronchioles. -Due to the amount of cartilage in the trachea, you can tell difference b/w trachea, bronchi and bronchioles based on the size of the structure and also the presence of cartilage and what form the cartilage is presented in

Interstitial Lung Disease – Pathologia

Histology - Yale Universit

Air conduction: Larynx, Trachea, Bronchi and Bronchioles

Bronchus: Similar to trachea, but C-shaped cartilage is replaced by discontinuous plates of cartilage. Complete layer of smooth muscle and occasional glandular tissue may be seen. Bronchi differ in size and amount of cartilage. If the tube has any cartilage at all, it is a bronchus. If it does not, it is a bronchiole What are Bronchioles. The smallest airways within the lungs that are not encircled by any cartilage are called bronchioles [1].Once the trachea divides into the left and right primary bronchi, they then branch into smaller and smaller divisions to lead to bronchioles.The trachea, bronchi, bronchioles, and alveoli all make up the lower respiratory tract [2] 1) Conduct Air: so it can reach the gas exchange area the alveoli 2) Condition Air: warm, moisten and remove particulate matter from the air 3) Produce speech from air passing through the larynx; 4) Smell- air passing over olfactory mucosa in nose carry stimuli for sense of smel

Histology of trachea and lung

EXTRAPULMONARY & INTRAPULMONARY BRONCHUS. 1. PRINCIPAL (Primary) BRONCHUS. Trachea bifurcates at Carina (at lower border of T4 vertebra at T4-T5 disc space) into right and left principal (primary) bronchi.; Right principal bronchus is wider, shorter (2.5 cm long), and more vertical in the line of trachea (25 degree with median plane) Study Biological Role of Respiration, Histology and Defense Mechanisms flashcards from Anna Chin's class online, or in Brainscape's iPhone or Android app. Learn faster with spaced repetition • The lower airway includes structures below the larynx—the trachea, bronchi, bronchioles, and alveoli. The larynx functions to prevent aspiration during swallowing and is the location of the vocal cords. • The trachea, bronchi, and bronchioles serve as conducting passageways for air. They do not engage in gas exchange

Bronchi And BronchiolesThe Tracheobronchial Tree - Trachea - Bronchi - TeachMeAnatomy

As nouns the difference between trachea and bronchus is that trachea is (anatomy) a thin-walled, cartilaginous tube connecting the larynx to the bronchi; the windpipe while bronchus is either of two airways, which are primary branches of the trachea, leading directly into the lungs What is a difference between bronchi and bronchioles in regards to their support? What are the differences between the right and left lungs? 1. The right lung larger and has three lobes Histology Lab Photo Quiz. 46 terms. robswatski TEACHER. A&P2: Test 3 (2) 86 terms. tmarvel1 The bronchi further divides, finally giving rise to the bronchioles which are less than 1mm in diameter. Each bronchioles divides into 50 to 80 terminal bronchioles, the final branches of respiratory bronchioles. The functional unit of the lungs which is the acinus includes the respiratory bronchioles, alveolar ducts, and sacs and the alveolar[1] The lobar bronchi then progressively split into shorter and narrower airways until the final, smallest conducting airway known as the terminal bronchiole is reached. On average there are roughly 17 branch points between the trachea and any particular terminal bronchiole Lung, bronchus- 100X The next thing to learn is how to tell bronchi (brs) from bronchioles. They both have the folded mucosa, so that feature won't help in this case. But bronchi have cartilage in their walls. Here, a plate of hyaline cartilage can be seen in the upper outer edges of the bronchus

They are the continuation of the bronchi however there are some major differences between them; Unlike bronchi, bronchioles don't have any cartilage in the supporting layer. They don't have glands in their mucosa (initially, there might be 1-2 glands in the mucosa of a large bronchiole. However, as we proceed, there won't be any) Anatomy. A bronchus, which is also known as a main or primary bronchus, represents the airway in the respiratory tract that conducts air into the lungs.Bronchi will branch into smaller tubes that become bronchioles.. The trachea (windpipe) is found inferior to the thyroid cartilage and superior to division into the left and right main bronchus List the components of the wall of the trachea. Compare and contrast the structural features of the wall of the trachea, an intrapulmonary bronchus and a bronchiole. List the cell types you would expect to find in an alveolus. Correlate alveolar structure with alveolar function

Bronchi: Anatomy, function and histology Kenhu

Bronchus and Bronchiole 22. DIFFERENCES BETWEEN BRONCHI AND BRONCHIOLES Bronchus Glands are present. Presence of cartilage. Goblet cells are present. Spiraliy arranged smooth muscle layer. Mucosa folded lined by ciliated pseudostratified columnar cells Tertiary bronchi (aka, segmental bronchi) serve specific bronchopulmonary segments. Bronchioles are histologically different. Terminal bronchioles are the final branches of the conducting portion of the respiratory system. Respiratory bronchioles are the start of the respiratory portion, as they can participate gas exchange An intrapulmonary bronchus with several separate pieces of hyaline cartilage in its wall. A thin layer of bright pink smooth muscle lies between the cartilage and the mucosa. (The mucosa, as always, consists of epithelium and underlying connective tissue. A bronchiole branches from the tertiary bronchi. Bronchioles, which are about 1 mm in diameter, further branch until they become the tiny terminal bronchioles, which lead to the structures of gas exchange. There are more than 1000 terminal bronchioles in each lung. The muscular walls of the bronchioles do not contain cartilage like those of the.

conducts the air from nose to lung and consists of . nasal cavity ,. nasopharynx . larynx, . trachea, . bronchi ,. Bronchiole, and terminal bronchiole. RESPIRATORY PART : it consists of alveoli ( small saccular structure whose thin walls enables gas exchange between air and blood ), alveolar ducts and alveolar sacs Identification of serous-like cells in the surface epithelium of human bronchioles. Eur Respir J 1993 ; 6 :498-504. Boujaoude , LC , Bradshaw-Wilder , C , Mao , C , et al. Cystic fibrosis transmembrane regulator regulates uptake of sphingoid base phosphates and lysophosphatidic acid: modulation of cellular activity of sphingosine 1-phosphate

Bronchioles and alveoli histology - Osmosi

Rotate the 3D model to see the relationship between the diaphragm and the lungs. The lower respiratory system, or lower respiratory tract, consists of the trachea, the bronchi and bronchioles, and the alveoli, which make up the lungs. These structures pull in air from the upper respiratory system, absorb the oxygen, and release carbon dioxide. The trachea divides into tubes called bronchi, which enter the lungs and divide into smaller bronchi. These divide to form smaller branches called bronchioles. At the end of the bronchioles are tiny air sacs known as alveoli. The alveoli absorb oxygen into your blood from the inhaled air and remove carbon dioxide from the blood when you exhale Read chapter 17 of Junqueira's Basic Histology: Text and Atlas, 15e online now, exclusively on AccessMedicine. AccessMedicine is a subscription-based resource from McGraw Hill that features trusted medical content from the best minds in medicine

Respiratory Histology Flashcards Quizle

bronchioles) and a respiratory part (respiratory bronchioles). The terminal bronchioles of the conducting part are followed by the respiratory bronchioles, and the difference between them is histological. The terminal bronchioles are lined by simple columnar, simple cuboidal, or Clara cells, while the respirator The bronchi are lined with the same type of mucus that lines the rest of the respiratory tract. Deeper into the lungs, each bronchus is further divided into five smaller, secondary bronchi, which. Bronchial smooth muscle surrounding bronchi and bronchioles can significantly modulate the diameter and thus resistance of these airways. Bronchoconstriction is mediated by neurons of the Parasympathetic Nervous System which travel via the Vagus nerve and release acetylcholine on bronchial smooth muscle cells. Bronchodilation is mediated by neurons of the Sympathetic Nervous System which.

How to differentiate between terminal and respiratory

  1. al bronchioles) and a respiratory zone (lung parenchyma; i.e., respiratory bronchioles, alveolar ducts, alveolar sacs).The conducting zone is composed of nonrespiratory tissue and provides the passage for ventilation.
  2. The difference between bronchi and bronchioles is that the bronchi are air passages into the lungs that begin at the end of the trachea. While the bronchioles or bronchioli are Read the Post
  3. TABLE I. Comparison of species differences in tracheobronchial airway organization1-4 Parameter Human Monkey Mouse Lung % 1 1.8 11 Cartilage in wall Trachea to distal bronchiole Trachea to distal bronchiole Trachea to lobar bronchi Nonrespiratory bronchiole Several generations Several generations Several generations Respiratory bronchioles.
  4. al bronchiole ter
  5. There are two main bronchial tubes, or bronchi (singular, bronchus), called the right and left bronchi. The bronchi carry air between the trachea and lungs. Each bronchus branches into smaller, secondary bronchi; and secondary bronchi branch into still smaller tertiary bronchi. The smallest bronchi branch into very small tubules called bronchioles
  6. Trachea and bronchi histology. Bronchioles and alveoli histology. Transcript. Content Reviewers: Rishi Desai, MD, MPH. Contributors: Justin Ling, MD, MS, Kaylee Neff. The mammary glands of each breast consist of about 15 to 25 sections called lobes with each lobe containing many smaller structures called lobules
  7. This chapter is most relevant to Section F1(iv) from the 2017 CICM Primary Syllabus, which expects the exam candidates to be able to outline the anatomy of the pulmonary and bronchial circulations. Notable is the (surely, carefully chosen) wording of outline, by which the college usually mean provide a summary of the important points.This is in contrast to the usual understand or.

Bronchioles lack cartilage and contain more smooth muscle in their walls than the bronchi. These features allow airflow regulation by altering the diameter of the bronchioles. • Bronchioles branch further into terminal bronchioles. • The airways from the nasal cavity through the terminal bronchioles are called the conducting zone Table 2 Differences in histology in bronchi and bronchioles Full table Epithelium hyperplasia/squamous metaplasia In bronchiectatic airways ( Figure 1A ) compared to the non-diseased areas, there was an increase in epithelial hyperplasia in both the bronchi ( Figure 1B ) and in bronchioles ( Figure 1C ) 3.1 Lung Anatomy and Function So, in order to understand the way that lung abnormalities are classified and described in diagnostic reports, particularly in pathology reports, some understanding of the components of the lung tissue is helpful.. 3.1.1 Normal Lung Anatomy Firstly, inhaled air is transmitted down the trachea to the main bronchi and then to the bronchioles Compare and contrast the histologic features, cell composition and functional differences between respiratory epithelium and olfactory epithelium. Describe the histologic features and functions of the vomeronasal organ. List four functions of the conducting airways. Compare and contrast the histologic features of the trachea, bronchi, and.

Study free Histology flashcards and improve your grades. Matching game, word search puzzle, and hangman also available Distinguish between a primary, secondary, and tertiary bronchus. Respiratory System Background Information: The respiratory system is primarily responsible for the movement of oxygen from the. Goes into the lungs through tubes called mainstem bronchi. One mainstem bronchus leads to the right lung and one to the left lung. In the lungs, the mainstem bronchi divide into smaller bronchi. Then into even smaller tubes called bronchioles. Bronchioles end in tiny air sacs called alveol Type II pneumocytes. dust cells (=macrophages) Identify structures and different regions. Terminal bronchiole (thicker with smooth muscles) dividing into 2 respiratory bronchioles, in which alveoli appear. - sponge-like appearance of the lung is due to the abundance of alveoli and alveolar sacs

Histology of the Larynx, Epiglottis, Trachea and Bronchial

1 Answer. Conducting zone: it is a zone which conducts air and allows it to pass in and out of the lungs. This zone is made up of nose, pharynx, larynx, trachea, bronchi and bronchioles. Respiratory zone: it is a zone where actual respiration and gas exchange takes place. This zone is made up of alveoli, alveolar ducts, and respiratory bronchioles The inclusion of what structure distinguishes respiratory bronchioles from terminal bronchioles? What are the approximate dimensions of an alveolus? What is the difference between alveolar ducts and alveolar sacs? What is an alveolar septum and what is it made of? Describe the shape of Type I alveolar cells. Describe the shape of Type II. Right Main Bronchus. The structure indicated is the right main bronchus.The trachea divides into two main bronchi - the right main bronchus and the left main bronchus (also referred to as primary bronchi).The trachea divides at the level of the sternal angle and the point at which it bifurcates is known as the carina - a cartilaginous ridge which runs between the left and right main bronchi The transition between the conductive and the respiratory portions of an airway lies on average at the end of the 16th generation, if the trachea is counted as generation 0. The conducting airways comprise the trachea, the two stem bronchi, the bronchi, and the bronchioles. Their function is to further warm, moisten, and clean the inspired air. The human airways are innervated via efferent and afferent autonomic nerves, which regulate many aspects of airway function. It has been suggested that neural control of the airways may be abnormal in asthmatic patients, and that neurogenic mechanisms may contribute to the pathogenesis and pathophysiology of asthma

The estimated degree of obstruction was 17.6 ± 13.0% for bronchi, 12.7 ± 8.5% for bronchioles, and 0.2 ± 0.2% for terminal bronchioles. Statistical assessment of the mean bronchial obstruction score compared to the mean score from the uninjured tissue, with the nonparametric rank sum test, showed a nonsignificant difference ( P = 0.052) Bronchiolitis is a common lung infection in young children and infants. It causes inflammation and congestion in the small airways (bronchioles) of the lung. Bronchiolitis is almost always caused by a virus. Typically, the peak time for bronchiolitis is during the winter months What is difference between bronchi and bronchioles? The bronchi (or bronchus ) are the air passages into the lungs that begin at the end of the trachea. The bronchioles or bronchioli are the passageways by which air passes through the nose or mouth to the alveoli (air sacs) of the lungs, in which branches no longer contain cartilage or glands. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures

Histology Respiratory - Medical Immunology Med100 withHistology: Respiratory - College Of Medicine (com) 02 with

Bronchus - Wikipedi

ANOVA Two Way Factor with Replication was performed for analysis of the three airway types (main stem bronchus, segmented bronchus, and terminal bronchioles) between PBS and poly(I:C) treated lungs Lecture 5 asthma and copd. This section of centriacinar emphysema shows the enlarged air spaces around a small airway. Respiratory epithelium remains at the arrow. The more peripheral alveoli are normal. Figure A: location of lungs in the body and airways in the lungs. Figure B: a normal, non-asthmatic airway Trachea, in vertebrates and invertebrates, a tube or system of tubes that carries air.In insects, a few land arachnids, and myriapods, the trachea is an elaborate system of small, branching tubes that carry oxygen to individual body cells; in most land vertebrates, the trachea is the windpipe, which conveys air from the larynx to the two main bronchi, with the lungs and their air sacs as the. Study free Science flashcards and improve your grades. Matching game, word search puzzle, and hangman also available

File:Alveolar-sac-01