Rectum

Question 0

Lymphatic drainage of the inferior half of rectum

Answer 0

Middle rectal vessels - internal iliac nodes

Question 1

Lymphatic drainage of superior 1/2 of rectum

Answer 1

Para-rectal LN - inferior mesenteric and lumbar nodes

Question 2

Innervation of anal canal below pectinate (denate) line

Answer 2

Inferior rectal nerve (S2, S3, S4)

1. External anal sphincter and perianal skin
2. Lymphatic drainage superficial inguinal LN

Question 3

Pudendal nerve

Answer 3

S2/3/4

1. Inferior rectal nerves
2. Perineal nerve
3. Dorsal nerve of penis or clitoris

Question 4

Perineal nerve

Answer 4

1. Ischiocavernosus
2. Bulbospongiosus
3. Superficial and deep transverse perini
4. Sphincter urethrae
   And skin over posterior 2/3rds of the labia majora and the mucous membrane of the labia minora

Question 5

Lymphatic drainage above denate line

Answer 5

Internal iliac LN