BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The testes are known as gonads. Their female counterpart are the ovaries. In addition to their role in the male reproductive system, the testes also have the distinction of being an endocrine gland because they secrete testosterone-a hormone that is vital to the normal development of male physical characteristics.

Detailed explanation-2: -The testes are two oval-shaped male reproductive glands that produce sperm and the hormone testosterone.

Detailed explanation-3: -What is testosterone? Testosterone is produced by the gonads (by the Leydig cells in testes in men and by the ovaries in women), although small quantities are also produced by the adrenal glands in both sexes. It is an androgen, meaning that it stimulates the development of male characteristics.

Detailed explanation-4: -Fetal and adult periods of testosterone production. Fetal Leydig cells produce the high levels of testosterone that are required for the differentiation of the male genitalia and for brain masculinization.