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| | Persistence of Long, Thin Chrysotile Asbestos Fibers in the Lungs of Rats |
 | | Chrysotile asbestos inhalation in rats: deposition pattern and reaction of alveolar epithelium and pulmonary macrophages. | | | Roughly half of all first-duct bifurcations are found within 1 mm of the visceral pleural surface, which corresponds to the peripheral tissue resected and digested in our previous study (3). | | | In this report, we review some of our recent findings on the fate of inhaled chrysotile asbestos in the lungs of rats. |
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http://ehp.niehs.nih.gov/members/1994/Suppl-5/coin-full.html
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| | Environmental Health Perspectives 105, Supplement 5, September 1997: Article by Brody et al. |
| | Asbestos-induced alveolar injury: evidence for macrophage-derived PDGF as a mediator of the fibrogenic response. | | | The cultures have been maintained up to 8 weeks, with resistances greater than 2 K | | | Similar systems can be used during in vitro investigation of particle-induced fibroproliferative disorders. |
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http://ehp.niehs.nih.gov/members/1997/Suppl-5/brody-full.html
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| | 5. Uptake, clearance, translocation |
| | They pointed out that the enhanced deposition at alveolar duct bifurcations observed in the rat may not occur in all species. | | | In their study, rats were exposed by inhalation to 10–15 mg/m | | | Thickened alveolar duct bifurcations, associated with aggregates of macrophages, were seen long after exposure ceased, but crocidolite-exposed rats also had subpleural collections of alveolar macrophages, many of which contained crocidolite fibres. |
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http://www.sante.gouv.fr/amiante/connaitre/sciences/rapportc5.htm
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| | Blue Histology - Respiratory System |
| | The basal laminae of the epi- and endothelium may actually fuse. | | | Choose subject area "respiratory system" on the Quiz page | | | structures, which function as ducts, and which together are called the conductive portion of the respiratory system |
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http://www.lab.anhb.uwa.edu.au/mb140/CorePages/Respiratory/respir.htm
(2582 words)
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| | eMedicine - Pulmonary Interstitial Emphysema : Article by Beverly P Wood, MD, MS, PhD |
| | Excessive intra-airway pressure may lead to leak from the alveolar ducts (primordial acini) into the lung interstitium. | | | Currently, PIE is seen more often in infants on long-term ventilator therapy with uneven aeration and bronchopulmonary dysplasia (BPD) leading to air trapping and potential airspace rupture. | | | Background: Pulmonary interstitial emphysema (PIE) is an iatrogenic pulmonary condition of the premature infant with immature lungs. |
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http://www.emedicine.com/radio/topic584.htm
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| | [No title] |
| | Smooth muscle- cords of smooth muscle are found in the non-respiratory portions of the respiratory bronchioles (that is those portions that serve a structural function). | | | B is wrong because respiratory bronchioles are lined by simple cuboidal epithelium. | | | C is correct because alveolar ducts, and thus alveoli, come off of respiratory bronchioles. |
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http://cpmcnet.columbia.edu/student/ssn/histology/lung05.doc
(874 words)
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| | Electron Microscopy/ Imaging |
| | On the right edge of the image is a portion of a respiratory bronchiole with its simple cuboidal epithelium leading into an alveolar duct, which is an open channel bounded on all sides by alveoli. | | | Smooth muscle continues in the wall of the alveolar duct. | | | It is distinguished from the bronchi from which they arise by: 1) lack of cartilage and glands and 2) simpler (lower) ciliated epithelium with diminishing numbers of goblet cells. |
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http://www.wv-hsta.org/Nanatomy/Electron.htm
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| | Copper Trace Mineral |
| | rat epididymis and the effects of efferent duct ligation no the | | | Additional adult rats were subJected to unilateral efferent duct | | | alveolar duct may reflect the ability of these cells to acquire |
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http://www.cfsn.com/copper5.html
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| | Bronchus - Wikipedia, the free encyclopedia |
| | This property allows a bronchopulmonary segment to be surgically removed without affecting other segments. | | | There are 5 or 6 alveolar sacs associated with each alveolar duct. | | | The alveolus is the basic anatomical unit of gas exchange in the lung. |
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http://en.wikipedia.org/wiki/Bronchus
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| | Pathology Review Carousel |
| | Occurs in mature or postmature infant with intrauterine distress. | | | Results from lack of surfactant and consequent pulmonary instability. | | | Hyaline membranes (which are not distinctive or specific) and close view of immature lung with thick septa. |
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http://medic.med.uth.tmc.edu/edprog/Path/Pedi-a.htm
(367 words)
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| | [No title] |
| | Surfactant secretion can be induced by administering glucocorticoids, significantly improving the infant's condition and chances for survival. | | | There, the bodies fuse with the apical plasma membrane and release surfactant onto the alveolar surface. | | | Not only does it reduce surface tension in the alveoli, but also it is thought to have some bactericidal effects, cleaning the alveolar surface and preventing bacterial invasion of the many capillaries in the septa. |
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http://www.loyno.edu/~chood/histnotesresp.html
(4258 words)
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| | Encyclopedia article on Respiratory system [EncycloZine] |
| | The respiratory bronchioles, alveolar ducts, and alveoli make up the respiratory zone. | | | The right and left bronchioles, terminal bronchioles, respiratory bronchioles, alveolar ducts, and alveoli form the right and left lungs respectively. | | | The trachea, bronchi, bronchiles, and terminal bronchioles make up the conducting zone. |
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http://encyclozine.com/Respiratory_system
(777 words)
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| | AD = alveolar duct |
| | Alveolar ducts are the pathways that further branch into alveolar sacs and alveoli. |
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http://www.calpoly.edu/~eperryma/yewang/alveduct.htm
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| | Pulmonary alveolus - Wikipedia, the free encyclopedia |
| | For example, alveolar epithelia secrete vasodilating substances in response to normal levels of oxygen. | | | Homeostatic responses in the lungs minimize the mismatching of ventilation and blood flow. | | | The alveolar oxygen pressure is lower than the atmospheric O |
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http://en.wikipedia.org/wiki/Pulmonary_alveolus
(1392 words)
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| | Unknown 14 |
| | Alveolar damage (AD) with hyaline membranes is an infrequent pattern seen in pneumocystis pneumonia, occurring in both AIDS and non-AIDS patients [1]. | | | A section from another patient with early honeycombing shows dilation of respiratory bronchioles and alveolar ducts produced by collapse of intervening alveolar spaces. | | | There is one prominent focus of foamy alveolar exudate to the left of center. |
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http://pathhsw5m54.ucsf.edu/cts/unknown14/dad.html
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| | Lab 15: Respiratory Tract, Lungs |
| | Carefully study the tissue on the lumenal side of the cartilage and you will note the epithelia, lamina propria and submucosa. | | | Distinguish the components of the respiratory tree (bronchi, bronchioles, terminal bronchiole (theory) respiratory bronchioles, alveolar ducts, alveoli sacs, and alveoli). | | | Understand the blood circulation through the lung (pulmonary and systemic vasculature). |
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http://anatomy.iupui.edu/courses/histo_D502/D502f04/Labs.f04/Lab15/Lab.15.respir.f04.html
(2366 words)
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| | American Journal of Respiratory and Critical Care Medicine: On the Role of Surface Tension in the Pathophysiology of ... |
| | Because the major histologic difference between the normal lung and the emphysema lung is loss of lung parenchyma, it is logical to conclude that the physiology of emphysema is mechanically determined by loss of the tissue component of recoil. | | | This network model does not consider alveolar duct mechanics or parenchymal interdependence in three dimensions but does provide useful insights into how alterations in surface tension could affect parenchymal microstructure in heterogeneous emphysema through parenchymal interdependence. | | | Over many years, parenchymal destruction and incomplete healing result in loss of tissue collagen and elastin, enlargement of alveolar airspaces, and, ultimately, the classic physiologic characteristics of advanced emphysema: hyperinflation, loss of elastic recoil at a given lung volume, loss of surface area for gas exchange, and severe flow limitation. |
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http://www.findarticles.com/p/articles/mi_qa4085/is_200502/ai_n10298151
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| | Translated by WordPort from Nota Bene ver. 4 document LAB#6NB.206 |
| | The alveolar macrophages may be characterized by the abundant foamy cytoplasm | | | This portion of the conducing system is identified as alveolar duct. | | | The bulbous knobs of tissue in the alveolar ducts are covered by non-ciliated low cuboidal or squamous epithelial cells, beneath which lie bundles of smooth muscle, elastic and some reticular fibers. |
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http://www.urmc.rochester.edu/smded/Path505/Labs/lab6.html
(410 words)
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| | CHEST: Expression of genes coding for growth factors in experimental pneumoconiosis - Session 4 - The Thomas L. Petty ... |
| | Tissue from unexposed controls and the alveolar walls distal to developing lesions in the exposed rodents are negative for PDGF expression (not shown). | | | We have extensively characterized a rodent model of inflammation and fibrosis induced by asbestos(17) that will provide us the framework for understanding the molecular biology of the fibrotic disease process. | | | The rodent model of fiber-induced IPF is an ideal system for probing the molecular mechanisms of the disease.(3) |
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http://www.findarticles.com/p/articles/mi_m0984/is_n3_v109/ai_18157747
(677 words)
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| | The Respiratory System |
| | Other alveoli are seen at the right of the field of view. | | | Sometimes alveoli are sectioned such that they look free-standing, that is you can’t see whether they arise from a respiratory bronchiole, alveolar duct or aleolar sac (see for example the alveoli at the left in Figure 17). | | | Eventually alveoli are so frequent that they are side by side separated only by their walls (alveolar septa). |
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http://courseweb.edteched.uottawa.ca/medicine-histology/English/Respiratory
(4511 words)
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| | XI. Splanchnology. 1e. The Lungs. Gray, Henry. 1918. Anatomy of the Human Body. |
| | With each atrium a variable number (2–5) of alveolar sacs are connected which bear on all parts of their circumference alveoli or air sacs. | | | Each alveolar duct is connected with a variable number of irregularly spherical spaces, which also possess alveoli, the atria. | | | The primary lobule consists of an alveolar duct, the air spaces connected with it and their bloodvessels, lymphatics and nerves. |
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http://www2.bartleby.com/107/240.html
(2952 words)
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| | Histology IJS (1) |
| | Macrophages may be present in the wall, and in the lumen, of alveoli. | | | Alveolar sacs are collections of alveoli which arise from a short alveolar duct. | | | In their absence, the thin alveolar walls would rupture if there was a difference in the air pressure between adjacent alveolar sacs. |
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http://www.abdn.ac.uk/~bms027/TH1.H2.4.html
(199 words)
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| | Example: Alveolar Ducts |
| | You can think of it as a passageway whose walls are constructed of alveoli. | | | Once the deepest portions of the purely air conducting pathway of the lung have been reached, air still has to move around, and to come into contact with the maximum amount of exchange surface. | | | The alveolar duct is a difficult thing to describe, since it's also a gas exchange region. |
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http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab25/EXAMPLES/EXALVDCT.HTM
(111 words)
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| | 3D Diagram Alveolar Sac |
| | Free macrophages (not shown here) may be found in the alveoli or wandering around on the surface; or they may be "in transit" between the CT or the alveolar lumen. | | | An alveolar sac is composed of individual alveoli grouped into a sort of dead-end structure, fed by the smallest level of the bronchiolar airways (or sometimes by an alveolar duct, which isn't present here. | | | Macrophages also use the alveolar pores to get from one alveolus to another. |
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http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab25/EXAMPLES/exalvsacdiag.htm
(245 words)
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| | Alveolar Duct |
| | Respiratory bronchioles feed into alveolar ducts, which are formed by a series of alveoli lying adjacent to one another. | | | This site was last modified May 10, 2002. | | | These ducts eventually terminate in groups or clusters of alveoli called alveolar sacs. |
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http://bioweb.uwlax.edu/aplab/Table_of_Contents/Lab_14/Alveolar_Duct/alveolar_duct.html
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| | Review Glossary |
| | ducts which carry bile from the liver parenchyma; bile ducts fuse to form the hepatic duct | | | black debris found in the alveolar macrophages of those individuals chronically exposed to smoke | | | the ductus deferens and the duct of the seminal vesicle form this structure in the body of the prostate gland; empties into the urethra |
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http://medinfo.ufl.edu/year1/histo/glossary.html
(6519 words)
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| | Histolab 3c.htm |
| | GO TO THE NEXT LABORATORY - Gastrointestinal Sys.2 and Urinary System | | | This structure may be hard to find, so rely on your atlas for the best illustration. | | | Find examples of intralobular ducts (within a lobule of glandular material) and interlobular ducts (between glandular lobules, in the connective tissue septa). |
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http://faculty.une.edu/com/abell/histo/histolab3c.htm
(1593 words)
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| | The Lungs |
| | This septal pattern is unique for the lung. | | | Alveolar ducts - the respiratory bronchioles open up into these large spaces. | | | This is an image showing the final two smallest structure you will find in the lungs. |
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http://www3.umdnj.edu/histsweb/lab10/lab10lung.html
(863 words)
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| | LUNG ALVEOLI |
| | Each of the respiratory bronchioles inside a pulmonary lobule gives rise to several alveolar ducts. | | | Protruding from the thin walls of the alveolar ducts and respiratory bronchioles are numerous cup-shaped alveoli, each measuring about 0.2 to 0.5 mm in diameter. | | | The complex of phospholipids and proteins in the surfactant reduces surface tension inside the alveoli, which keeps the alveolar walls from sticking together as they deflate during exhalation. |
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http://www.getbodysmart.com/ap/respiratorysystem/lungs/alveoli/animation.html
(243 words)
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| | Respiratory Portion |
| | These organelles are believed to be the secretory granules for surfactant. | | | Further down, the numbers of alveolar openings increase and start to dominate the wall structure until the tube is made up of a mass of alveoli opening into, what is now, the alveolar duct. | | | Terminal bronchioles (bottom left) have ciliated columnar or cuboidal epithelium and are the last conducting passageway that does not exchange gases. |
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http://www.abdn.ac.uk/~bms210/alveoli.htm
(395 words)
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| | Untitled Document |
| | The bronchi lead to the respiratory zone, collectively referred to as the paired lungs: alveoli, alveolar duct and alveolar sac. | | | The respiratory system from the nasal cavity through the terminal bronchioles is referred to as the conducting zone. | | | The alveolar PCO2 is 40 mmHg and the blood PCO2 is 45 mmHg, therefore there is a net diffusion of CO2 into the alveoli, decreasing blood PCO2 to 40 mmHg. |
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http://www.humboldt.edu/~mlt15/lab18.html
(617 words)
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| | Female Reproductive System |
| | The longitudinal muscle bundles are most prominent in the center of the nipple where they course with the lactiferous ducts. | | | This section is probably from a breast during early to mid pregnancy since only a small amount of secretory material can be identified in a few of the lumens. | | | The ducts end blindly and have no alveoli at their ends. |
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http://www.mc.vanderbilt.edu/histology/labmanual2002/labsection3/MammaryGlands03.htm
(555 words)
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| | Glossary |
| | Alveolar (awl-VEE-o-lar) duct A branch of a respiratory bronchiole within the lungs that leads to alveoli and alveolar sacs. | | | Duodenum (doo-o-DEE-nuhm) The first segment of the small intestine that extends from the pyloric valve to the jejunum. | | | Ductus deferens (DUHK-tuhs DEHF-er-ehnz) The tube that conducts sperm from the epididymis in the testes to the ejaculatory duct. |
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http://www.sci.sdsu.edu/histology/gloss_a.htm
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| | VE Glossary |
| | Most forward part of three brain area; Includes cerebral cortex and limbic system and is also know as prosencephalon | | | Fissure between maxillary process of first arch and lateral nasal process | | | Canal leading from the common atrium to the left ventricle |
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http://www.visembryo.com/baby/gloss.html
(4499 words)
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