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Question
State very briefly the chief function of each of the following: [4 MARKS]
(i) Seminal vesicles (ii) Prostate gland (iii) Cowper's gland (iv) Sperm duct (vas deferens)
(i) Seminal vesicles (ii) Prostate gland (iii) Cowper's gland (iv) Sperm duct (vas deferens)
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Solution
Each Part: 1 Mark
(i) The seminal vesicles are a pair of lobulated glands located between the posterior surface of the urinary bladder and the rectum. A duct from each seminal vesicle joins the corresponding sperm duct just before it unites with the urethra. The seminal vesicles do not store sperms but produce a secretion which serves as a medium for the transportation of the sperms. The mixture of this fluid and the sperms produces a milky fluid, the semen. In the sperm duct, the sperms are sluggish, but by the addition of this secretion, they become active.
(ii) Prostate gland is a bilobed structure which surrounds the urethra close to its origin from the bladder. It pours an alkalines secretion into the semen as it passes through the urethra.
(iii) Cowper's glands are two small ovoid glands which open into the urethra just before it enters the penis. The secretion serves as a lubricant. Urethral glands by the side of urethra in the penis also give out a lubricating secretion.
(iv) Sperm duct (vas deferens). Measuring about 45 cm is a muscular sperm duct that ascends along the posterior border of the testes, penetrates the inguinal canal, enters the pelvic where it loops over the urinary bladder and then descends to join the urethra at the back of the urinary bladder.
(i) The seminal vesicles are a pair of lobulated glands located between the posterior surface of the urinary bladder and the rectum. A duct from each seminal vesicle joins the corresponding sperm duct just before it unites with the urethra. The seminal vesicles do not store sperms but produce a secretion which serves as a medium for the transportation of the sperms. The mixture of this fluid and the sperms produces a milky fluid, the semen. In the sperm duct, the sperms are sluggish, but by the addition of this secretion, they become active.
(ii) Prostate gland is a bilobed structure which surrounds the urethra close to its origin from the bladder. It pours an alkalines secretion into the semen as it passes through the urethra.
(iii) Cowper's glands are two small ovoid glands which open into the urethra just before it enters the penis. The secretion serves as a lubricant. Urethral glands by the side of urethra in the penis also give out a lubricating secretion.
(iv) Sperm duct (vas deferens). Measuring about 45 cm is a muscular sperm duct that ascends along the posterior border of the testes, penetrates the inguinal canal, enters the pelvic where it loops over the urinary bladder and then descends to join the urethra at the back of the urinary bladder.
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