Which gland accounts for about 60% of semen volume?

Which gland accounts for about 60% of semen volume?

• A. Prostate gland
• B. Seminal vesicles
• C. Bulbourethral glands
• D. Testes

Answer: (B)

The main idea here is how semen is formed from different accessory glands. The seminal vesicles are the primary source of semen volume, contributing roughly 60%. They secrete a thick, alkaline fluid rich in fructose to fuel sperm, along with prostaglandins that help propel sperm through the female reproductive tract and fibrinogen that helps form a temporary plasma-like clot after ejaculation. This combination makes the seminal vesicle fluid the dominant component of semen. The prostate adds another substantial portion but not the majority; its fluid is milky and slightly alkaline and contains substances that activate and support sperm. The bulbourethral glands contribute only small amounts, mainly mucus for lubrication and to clear residual urine from the urethra, while the testes provide sperm cells themselves rather than much volume of fluid.

The main idea here is how semen is formed from different accessory glands. The seminal vesicles are the primary source of semen volume, contributing roughly 60%. They secrete a thick, alkaline fluid rich in fructose to fuel sperm, along with prostaglandins that help propel sperm through the female reproductive tract and fibrinogen that helps form a temporary plasma-like clot after ejaculation. This combination makes the seminal vesicle fluid the dominant component of semen.

The prostate adds another substantial portion but not the majority; its fluid is milky and slightly alkaline and contains substances that activate and support sperm. The bulbourethral glands contribute only small amounts, mainly mucus for lubrication and to clear residual urine from the urethra, while the testes provide sperm cells themselves rather than much volume of fluid.