part of part of has part Homo sapiens large intestine anal canal rectum anus subdivision of digestive tract anorectum anorectal canal UBERON:8410050 A subdivision of the digestive tract in humans that includes the rectum, the anal canal and the anus. The anatomy, pathology and medical community considers the anus to be part of the large intestine, and supports the use of 'anorectum' to include rectum, anal canal and anus. Although a few resources seem to only include the distal part of the rectum in 'anorectum', this UBERON grouping term is meant to refer more broadly to the whole of rectum. anorectum