The sigmoid, rectum, and anal canal. Relations, attachments, and pelvic spaces.
D001003:Anal Canal / Q000033:anatomy & histology*; D012809:Colon, Sigmoid / Q000033:anatomy & histology*; D004389:Durable Medical Equipment; D006652:Histological Techniques; D006801:Humans; D010388:Pelvis; D012007:Rectum / Q000033:anatomy & histology*
ANUS/anatomy and histology; RECTUM/anatomy and histology; SIGMOID/anatomy and histology