Ans: A. Inferior rectal veinMesorectum is enclosed by mesorectal fascia, which is derived from the visceral peritoneum.Known as visceral fascia of mesorectum, fascia propria of rectum or presacral wing of hypogastric sheath.Upper rectum is derived from the embryological hind gut, it is surrounded by mesorectumdeg. Contents of Mesorectal fasciaSuperior rectal aery and its branchesSuperior rectal vein and tributariesLymphatic vessels and nodes along superior rectal aeries.Branches from inferior mesenteric plexus to innervate rectum.Loose adipose connective tissue down to the level of levator ani (pelvic floor).
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