The root of the penis is composed of ____.
a. two cylinders c. four cylinders
b. three cylinders d. five cylinders
Question 2
Although there is no bone and little muscle in the human penis, the root of the penis is attached to a number of muscles that help eject semen and ____.
a. allow blood to rush into the corpora cavernosa and corpus spongiosum
b. allow men to move the penis slightly when erect
c. regulate testicular temperature
d. elevate the testicles in response to sexual arousal
