are parts that are found on the bodies of male creatures. Male mammals, including men, have two testicles, supported in a sac of skin below the penis called the scrotum.

NOTE:Only males have testicles; females have ovaries.

The respective functions of the testes are: producing sperm (spermatozoa) producing male sex hormones of which testosterone

is the best-known

Both functions of the testicle, sperm-forming and endocrine, are under control of gonadotropic hormones produced by the anterior pituitary:

luteinizing hormone (LH) follicle-stimulating hormone (FSH)

Making hormones….

Testicles are a type of organ called glands. (This makes them part of the body's endocrine system.)

Testicles make several types of chemical substances. Making these substances is controlled by the pituitary gland which is a small gland in the brain.

It is the hormone testosterone which made by the testicles. Testosterone is important in a male person's body, because it makes him grow into a man and feel like a man during puberty.

Alright!

Making sperm…

Apart from hormones, the other important substances made by the testicles are spermatozoa, which are generally just called sperm.

Boys begin making sperm when they start growing into men, at a time of life called puberty.

INTERNAL APPEARANCE:

Primary Cell TyPes

WiThin The

seminiferous Tubules: