Video Transcript
The figure shows a side view of the
organs of the male reproductive system. What is structure B? (A) Bladder, (B) seminal vesicle,
(C) Cowper’s gland, bulbourethral gland, (D) prostate gland, or (E) epididymis.
Sperm are produced by the
seminiferous tubules in the testes. A single testis is shown as
structure E. The sperm is stored in the
epididymis where it matures until ejaculation. During ejaculation, the sperm move
along a tube called the vas deferens as shown by structure A. The sperm continue through this
tube to eventually exit the body through the urethra in the penis, which is shown as
structure D.
Along the way, the sperm are mixed
with different secretions from exocrine glands. One of these glands is shown as
structure C. This is the seminal vesicle. Another gland is shown as structure
B, the prostate gland. These glands secrete fluids that
mix with the sperm and form the semen that’s ejaculated. Therefore, structure B is given by
answer choice (D), prostate gland.
