Sperm are moved from the testis into the epididymis by
A) swimming under their own power.
B) gravity.
C) suction.
D) testicular fluid moved by cilia and smooth muscle cells.

Question

Quizplus · Accepted Answer

Sperm are moved from the testis into the epididymis by testicular fluid moved by cilia and smooth muscle cells. The cilia and smooth muscle cells create waves of contractions that move the sperm along. Sperm are not able to swim until they reach the epididymis where they mature and gain motility. Gravity and suction do not play a significant role in how sperm are moved into the epididymis.

Sperm Are Moved from the Testis into the Epididymis by