Microscopic Anatomy of the Lower Respiratory Tract of the Grey Short‐Tailed Opossum (Monodelphis domestica)

With 14 figures SUMMARY: The respiratory tracts of seven grey short‐tailed opossums were histologically examined. Six opossums were prepared by perfusion with buffered formalin. Opossum seven was perfused with gluteraldehyde. Samples taken from the respiratory passages and lungs of specimens 1–6 wer...

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Bibliographic Details
Published in:	Anatomia, histologia, embryologia Vol. 41; no. 2; pp. 96 - 105
Main Authors:	Cope, L. A, Henry, R. W, Reed, R. B. Jr
Format:	Journal Article
Language:	English
Published:	Oxford, UK Blackwell Publishing Ltd 01-04-2012
Subjects:	Animals bronchi Bronchi - anatomy & histology Bronchi - cytology Bronchi - ultrastructure cartilage formalin goblet cells Lung - anatomy & histology Lung - ultrastructure Microscopy Monodelphis - anatomy & histology Monodelphis domestica Muscle, Smooth - anatomy & histology Muscle, Smooth - ultrastructure opossums pleura Pleura - anatomy & histology Pleura - ultrastructure pneumocytes Pulmonary Alveoli - anatomy & histology Pulmonary Alveoli - cytology Pulmonary Alveoli - ultrastructure Respiratory Mucosa - anatomy & histology Respiratory Mucosa - ultrastructure Respiratory System - anatomy & histology Respiratory System - ultrastructure Staining and Labeling Trachea - anatomy & histology Trachea - cytology Trachea - ultrastructure
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Summary:	With 14 figures SUMMARY: The respiratory tracts of seven grey short‐tailed opossums were histologically examined. Six opossums were prepared by perfusion with buffered formalin. Opossum seven was perfused with gluteraldehyde. Samples taken from the respiratory passages and lungs of specimens 1–6 were stained with haematoxylin and eosin. A mixture of methylene and azure blue was used for specimen 7. The trachea and right and left principal bronchi are lined with a pseudostratified ciliated columnar epithelium with occasional goblet cells. The secondary and tertiary bronchi and the primary and secondary bronchioles are lined by a simple ciliated columnar epithelium. The terminal bronchioles and a portion of the respiratory bronchioles are lined by a simple ciliated cuboidal epithelium. The terminal portion of the respiratory bronchioles and the alveolar ducts are lined with simple squamous epithelium. Alveoli are lined by type I and II pneumocytes. Tracheal glands are present in the tela submucosa. The fibromusculocartilaginous tunic of the trachea consists of c‐shaped cartilage rings and the trachealis muscle. A lamina muscularis mucosa begins in the intrapulmonary portion of the principal bronchus and continues into the respiratory bronchioles. Bronchial glands are present in the propria submucosa and tela submucosa of the principal bronchi. The musculocartilaginous tunic is localized to the extrapulmonary portion of the principal bronchus. The bronchial cartilages are irregular shaped plates and limited to the extrapulmonary portion of the principal bronchus. The visceral pleura is a simple squamous mesothelium covering the outer surface of the lung.
Bibliography:	http://dx.doi.org/10.1111/j.1439-0264.2011.01107.x istex:8A2B8AC330E534FC0AD6122840BFC07A2530E035 ArticleID:AHE1107 ark:/67375/WNG-5WF138XD-M ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0340-2096 1439-0264
DOI:	10.1111/j.1439-0264.2011.01107.x