Microanatomy of the lung of the bowhead whale balaena mysticetus
Abstract The lungs from six bowhead whales harvested by Alaskan Eskimos have been examined with light and electron microscopes. Airways ranging from 1 to 40 mm in luminal diameter are lined by a pseudostratified ciliated epithelium containing numerous mucus‐secreting cells. The underlying lamina pro...
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crwiley:10.1002/ar.1092260208 2024-09-15T17:57:11+00:00 Microanatomy of the lung of the bowhead whale balaena mysticetus Henk, William G. Haldiman, Jerrold T. 1990 http://dx.doi.org/10.1002/ar.1092260208 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Far.1092260208 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ar.1092260208 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor The Anatomical Record volume 226, issue 2, page 187-197 ISSN 0003-276X 1097-0185 journal-article 1990 crwiley https://doi.org/10.1002/ar.1092260208 2024-07-11T04:39:20Z Abstract The lungs from six bowhead whales harvested by Alaskan Eskimos have been examined with light and electron microscopes. Airways ranging from 1 to 40 mm in luminal diameter are lined by a pseudostratified ciliated epithelium containing numerous mucus‐secreting cells. The underlying lamina propria‐tela submucosa of these airways contains tubuloalveolar glands, plasma cells, and lymphatic accumulations in addition to both elastic and collagenous fibrillar elements. Cartilage extends to the level of the respiratory airways, but smooth muscle is absent from airways larger than 3 mm, and tubuloalveolar glands are absent from airways smaller than 3 mm. Respiratory airways are lined by pseudostratified, simple cuboidal, and simple squamous epithelia. Alveolar ducts are lined by simple squamous epithelium exclusively. A connective tissue core composed mostly of elastic fibers supports the walls of the alveolar ducts. Neither smooth muscle nor cartilage has been observed in these structures. Alveoli contain the typical cetacean double capillary bed separated by a thick septum composed mainly of collagenous connective tissue. Alveoli are lined by a simple squamous epithelium similar to that encountered in alveolar ducts and respiratory airways. This epithelium is composed of type I and II pneumocytes closely appressed to an underlying capillary network. The type II pneumocytes contain typical lamellar bodies and tubular myelin can be seen in the air spaces. The lung is surrounded by a thick (X = 2.5 mm) visceral pleura rich in blood vessels and elastic fibers. Article in Journal/Newspaper Balaena mysticetus bowhead whale eskimo* Wiley Online Library The Anatomical Record 226 2 187 197 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The lungs from six bowhead whales harvested by Alaskan Eskimos have been examined with light and electron microscopes. Airways ranging from 1 to 40 mm in luminal diameter are lined by a pseudostratified ciliated epithelium containing numerous mucus‐secreting cells. The underlying lamina propria‐tela submucosa of these airways contains tubuloalveolar glands, plasma cells, and lymphatic accumulations in addition to both elastic and collagenous fibrillar elements. Cartilage extends to the level of the respiratory airways, but smooth muscle is absent from airways larger than 3 mm, and tubuloalveolar glands are absent from airways smaller than 3 mm. Respiratory airways are lined by pseudostratified, simple cuboidal, and simple squamous epithelia. Alveolar ducts are lined by simple squamous epithelium exclusively. A connective tissue core composed mostly of elastic fibers supports the walls of the alveolar ducts. Neither smooth muscle nor cartilage has been observed in these structures. Alveoli contain the typical cetacean double capillary bed separated by a thick septum composed mainly of collagenous connective tissue. Alveoli are lined by a simple squamous epithelium similar to that encountered in alveolar ducts and respiratory airways. This epithelium is composed of type I and II pneumocytes closely appressed to an underlying capillary network. The type II pneumocytes contain typical lamellar bodies and tubular myelin can be seen in the air spaces. The lung is surrounded by a thick (X = 2.5 mm) visceral pleura rich in blood vessels and elastic fibers. |
format |
Article in Journal/Newspaper |
author |
Henk, William G. Haldiman, Jerrold T. |
spellingShingle |
Henk, William G. Haldiman, Jerrold T. Microanatomy of the lung of the bowhead whale balaena mysticetus |
author_facet |
Henk, William G. Haldiman, Jerrold T. |
author_sort |
Henk, William G. |
title |
Microanatomy of the lung of the bowhead whale balaena mysticetus |
title_short |
Microanatomy of the lung of the bowhead whale balaena mysticetus |
title_full |
Microanatomy of the lung of the bowhead whale balaena mysticetus |
title_fullStr |
Microanatomy of the lung of the bowhead whale balaena mysticetus |
title_full_unstemmed |
Microanatomy of the lung of the bowhead whale balaena mysticetus |
title_sort |
microanatomy of the lung of the bowhead whale balaena mysticetus |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1002/ar.1092260208 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Far.1092260208 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ar.1092260208 |
genre |
Balaena mysticetus bowhead whale eskimo* |
genre_facet |
Balaena mysticetus bowhead whale eskimo* |
op_source |
The Anatomical Record volume 226, issue 2, page 187-197 ISSN 0003-276X 1097-0185 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ar.1092260208 |
container_title |
The Anatomical Record |
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226 |
container_issue |
2 |
container_start_page |
187 |
op_container_end_page |
197 |
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1810433359997829120 |