Which of the following statements most applicable to the scrotum?


#1

A 32-year-old man undergoes vasectomy as a means of permanent birth control. A physician performing the vasectomy by making an incision on each side of the scrotum should remember which of the following statements most applicable to the scrotum?

(A) It is innervated by the ilioinguinal and

genitofemoral nerves.

(B) It receives blood primarily from the testicular

artery.

© Its venous blood drains primarily into

the renal vein on the left.

(D) Its lymphatic drainage is primarily into

upper lumbar nodes.

(E) Its dartos tunic is continuous with the

perineal membrane.

Explanation:

The answer is A. The scrotum is innervated by branches of the ilioinguinal, genitofemoral,

pudendal, and posterior femoral cutaneous nerves. The scrotum receives blood from the

posterior scrotal branches of the internal pudendal arteries and the anterior scrotal

branches of the external pudendal arteries, but it does not receive blood from the testicular

artery. Similarly, the scrotum is drained by the posterior scrotal veins into the internal

pudendal vein. The lymph vessels from the scrotum drain into the superfi cial inguinal

nodes, whereas the lymph vessels from the testis drain into the upper lumbar nodes. The

dartos tunic is continuous with the membranous layer of the superfi cial perineal fascia

(Colles’s fascia).