Vol. 11, Special Issue 7 (2022)

Author(s):
Pura Ram, Pankaj Kumar Thanvi, Ashok Dangi, Raj Kumar Siyag, Vijay Kumar Yogi, Shashi Kumar and Sanwar Mal

Abstract:
The present investigation was carried out on 10 rectums from recently slaughter adult pigs. Histologically, rectal wall was composed of four layers: tunica mucosa, tunica submucosa, tunica muscularis and tunica serosa or adventitia. Tunica mucosa was consisted of three layers: the lining epithelium, lamina propria and muscularis mucosae (lamina muscularis). Tunica submucosa layer made up of loose connective tissue with numerous small and large blood vessels. Tunica muscularis composed of inner circular muscle layer and outer longitudinal muscle layer and the outer longitudinal muscle layer contained more elastic fibres than the inner circular muscle layer. Tunica serosa or tunica adventitia was outermost layer of rectum wall consisting of loose connective tissue with many blood veins. The peritoneal portion of rectum covered by tunica serosa and retroperitoneal portion of rectum covered by tunica adventitia.