rectal
71rectal valve — a thin diaphragm located in the posterior fifth of the intestine of some Centrolophidae, e.g. Seriolella punctata, Schedophilus huttoni and Psenes pellucidus, or in others a sphincter like constriction, e.g. Seriolella brama. A deep purple fluid… …
72rectal gills — (ARTHROPODA: Insecta) In anisopteran Odonata nymphs, an elaborate system of folds in the wall of the rectum, the latter chamber forming the branchial basket …
73rectal glands — A term loosely applied to numerous glands adjacent to or associated with the anus; glands which often secrete either a lubricant, silk gum, or other specialized material such as a gelatinous matrix for the protection of eggs …
74rectal matrix glands — see matrix glands …
75rectal muscles — (NEMATA) Specialized muscles that function to open and close the anal opening …
76rectal pad — (ARTHROPODA: Insecta) Columnar epithelium (usually 6) extending longitudinally along the rectum, important in the reabsorption of water, salts and amino acids from the urine …
77rectal pouch — 1. (ARTHROPODA: Insecta) a. In some Coleoptera, an enlarged anterior part of the rectum opening into the hindgut; function unknown. b. In Isoptera, an enlargement of the colonic region of the hind gut that acts as a repository for symbiotic… …
78rectal tracheal gills — (ARTHROPODA: Insecta) In some nymphs of Odonata, lamellate structures in the rectum supplied with tracheae and tracheoles …
79rectal valve — (ARTHROPODA: Insecta) A circular or lobate fold of the hind intestine separating the distal intestine and rectum …
80rectal varicosity — noun haemorrhoid , hemorrhoid …