Question

Why is the human testis situated in the scrotum outside the abdomen?

Answer 1

Testes are male reproductive organs which are involved in production of male gametes - sperms and scrotum is seen as a sac of skin which hangs from the body at the front of the pelvis.

Complete answer:
- The human testes are located behind the penis in a pouch of skin called the scrotum. The testicles produce sperm and testosterone and androgens.
- The testicles are located outside the body because sperm development needs a much cooler or low temperature for their development than the body temperature.
- The process of spermatogenesis requires a lower temperature (i.e., 2 - 2.5°C) than the body and hence testes are present outside the abdominal cavity. The pouch is known as the scrotum or scrotal sac.
- The lower temperature is required for the maintenance of sperm and the process of spermatogenesis i.e., the formation of sperm. The scrotum helps in maintaining the low temperature of the testes (2-2.5°C lower than the normal internal body temperature) necessary for spermatogenesis.
- Testes also play an important role in the development of the muscles, deepening of the voice, body hair growth and development of other male characteristics.

Additional information: The male reproductive system consists of spermatic ducts, scrotum, testes , penis and sex glands.
- The reproductive system: Seminal vesicles, testes, vas deferens, scrotum and prostate gland
- Urinary system: Urethra and penis

Note: Testes are oval shaped bodies and they have two primary functions,
- Producing sperms.
- Producing hormones called Testosterone.