title: [Comparative-anatomical study of the formation of small and large intestinal (ileocecal) valve].
abstract: The results of the comparative-anatomical investigation of the formation of ileocecal valve are presented. The study was based on the examination of the specimens obtained from 123 representatives of all vertebrate classes and 48 isolated preparations of ileocecal area of the intestine of corpses of humans aged 22-64 years. It was performed using anatomical, histological and morphometrical methods. It was shown that the formation of this closing mechanism followed the route from sphincter between small and large intestine to the development of a shutter and, eventually, of a valve. Using these concepts, the structural variants of ileocecal valve which were detected in humans were analyzed taking into consideration both its extreme variation forms (ileocecal morphological sphincter without the valve and ileocecal valve without the sphincter) and intermediate forms, which should be considered as the variants of norm.
authors.affiliation: Department of Human Anatomy, Kazan State Medical University.
authors.forename: E S
authors.initials: ES
authors.lastname: Valishin
authors.forename: M S
authors.initials: MS
authors.lastname: Munirov
mesh_terms: D000328:Adult; D000818:Animals; D001001:Anura; D001717:Birds; D002415:Cats; D005260:Female; D005399:Fishes; D006801:Humans; D007080:Ileocecal Valve / Q000033:anatomy & histology*; D007420:Intestine, Large / Q000033:anatomy & histology*; D007421:Intestine, Small / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D013045:Species Specificity; D014426:Turtles