Final answer:
The testes, located in the scrotum, are responsible for sperm production and testosterone secretion. They contain seminiferous tubules where spermatogenesis occurs, and the epididymis for sperm maturation and storage.
Step-by-step explanation:
The testes, also known as testicles, have a dual function in the male reproductive system. The correct answer is b. Production of sperm and testosterone.
The testes are oval-shaped organs located within the scrotum, which is a sac hanging outside the body to maintain an optimal temperature for sperm viability. Each testis is divided into lobules, which contain seminiferous tubules that are the site of sperm production, known as spermatogenesis. The seminiferous tubules lead to the epididymis, where sperm maturation and storage occur.
In addition to sperm, the testes produce the male sex hormone testosterone, which plays a key role in the development of male secondary sexual characteristics and the regulation of male reproductive function. The scrotum assists in regulating the temperature of the testes by contracting or relaxing, bringing the testes closer to or further from the body to adjust to temperature changes.