The External Marking of the Boundary Between the Two Testes

Question

The external marking of the boundary between the two testes is the
A) spermatic cord.
B) raphe.
C) tunica albuginea.
D) acrosome.
E) dartos muscle.

Accepted Answer

The raphe is a visible line that extends from the base of the penis to the anus, marking the external boundary between the two testes. The spermatic cord is a structure that extends from the testis to the abdomen and contains blood vessels, nerves, and the vas deferens. The tunica albuginea is a tough, fibrous layer that surrounds the testis. The acrosome is a structure found on the head of a sperm cell that contains enzymes needed to penetrate the egg cell. The dartos muscle is a layer of smooth muscle in the scrotal wall that helps to regulate temperature by contracting or relaxing to adjust the distance of the testes from the body.