title: Pelvic anatomy. II. Anal canal and associated sphincters.
mesh_terms: D001003:Anal Canal / Q000033:anatomy & histology* / Q000294:innervation; D006651:Histocytochemistry; D006801:Humans; D007231:Infant, Newborn; D007413:Intestinal Mucosa / Q000033:anatomy & histology; D008297:Male; D009132:Muscles / Q000033:anatomy & histology; D010388:Pelvis / Q000033:anatomy & histology; D012007:Rectum / Q000033:anatomy & histology* / Q000294:innervation