EVERYDAY SCIENCE

Detailed explanation-1: -The gonads, the primary reproductive organs, are the testes in the male and the ovaries in the female. These organs are responsible for producing the sperm and ova, but they also secrete hormones and are considered to be endocrine glands.

Detailed explanation-2: -The two testicles (or testes) produce sperm and the male sex hormone testosterone.

Detailed explanation-3: -The testes are where sperm are produced. The testes are linked to the rest of the male reproductive organs by the vas deferens, which extends over the base of the pelvic bone or ilium, and wraps around to the ampulla, seminal vesicle, and prostate. The urethra then runs from the bladder through the penis.

Detailed explanation-4: -In males the gonads are called testes; the gonads in females are called ovaries. (see ovary; testis).

Detailed explanation-5: -There is a system of tiny tubes in the testicles. These tubes, called the seminiferous tubules, house the germ cells that hormones-including testosterone, the male sex hormone-cause to turn into sperm. The germ cells divide and change until they resemble tadpoles with a head and short tail.