Studies on the histogenesis of the Tunica mucosa of the stomach of the Egyptian water buffalo (Bos bubalus L.). IV. Histogenesis of the omasal mucosa.
In the fetal stage of 9 cm CRL 4 order omasal laminae are present. With increasing age they increase greatly in size and conical papillae are seen projecting from their sides into the lumen. At 27 cm CRL stage sporadic smooth muscle cells in the interlaminar spaces, representing the first appearance of the Lamina muscularis mucosae, become visible in the cores of the laminae in the fetus with 32 cm CRL. A fifth order lamina occurs in the fetus with 32 cm CRL as evaginations of epithelium and the underlying Lamina propria mucosae in the interlaminar spaces. The epithelium becomes stratified squamous keratinized assuming the features of the ruminal epithelium after birth.
D000818:Animals; D002020:Buffaloes / Q000196:embryology*; D002417:Cattle; D004848:Epithelium / Q000196:embryology; D005753:Gastric Mucosa / Q000196:embryology*