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Is Lamina Muscularis Mucosae Present in the Ruminal Mucosa of Cattle?
Author(s) -
Ikemizu T.,
Kitamura N.,
Yamada J.,
Yamashita T.
Publication year - 1994
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1994.tb00250.x
Subject(s) - muscularis mucosae , lamina propria , desmin , pathology , anatomy , biology , lamina , population , ultrastructure , vimentin , chemistry , epithelium , immunohistochemistry , medicine , environmental health
Summary The cells in the condensed fibrous layer in the lamina propria of the ruminal mucosa of the calves and cows were studied at the light microscopic level. Abundant actin‐immunoreactive cells were detected both in the calves and cows, while desmin‐immunoreactive cells were moderate in frequency in the cows and low or absent in the calves. Vimentin‐immunoreactive cells were abundant in the cows but moderate to low in frequency in the calves. These cells were distributed to form a condensed layer being more abundant in the ruminal papillae than the interpapillar mucosae in the cows and equal in the papillae and interpapillar mucosae in the calves. At the ultrastructural level, smooth muscle cells and fibroblasts were abundant in the deep core of the ruminal papilla of the cows. The present results suggest that the condensed fibrous layer revealed in the ruminal mucosae contains smooth muscle cell population which could be regarded as the specialized lamina muscularis mucosae.