This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
Into which structure does hemorrhage occur after injury to the inferior rectal vessels? 
Select and explain. 
A. A, B. B, C. C, D. E
D: E
Answer: D: E 
Explanation: Hemorrhage occur after injury to the inferior rectal vessels in ischiorectal fossa. The ischiorectal fossa lies in the anal triangle and is bound laterally by the obturator internus with its fascia and superomedially by the levator ani and external anal sphincter. It contains the inferior rectal vessels. Thus, haemorrhage occurs in the ischiorectal fossa when it is ruptured.