Explain testis function in the male reproductive system.

The paired testes (tes ‘-tez, singular, testis) are the male gonads, or sex glands. Each testis is protected and

supported by a capsule of dense irregular connective tissue. Septa (partitions) of connective tissue radiate into the testis from its posterior surface, dividing the testis into internal subdivisions called lobules. Each lobule contains several highly coiled seminiferous (se-mi-nif’-er-us) tubules. Seminiferous tubules are lined with spermatogenic epithelium, which is formed of spermatogenic cells and supporting cells. Spermatogenic cells divide to produce sperm, while supporting cells support and nourish the spermatogenic cells and help regulate sperm formation. The cells that fill the spaces between the seminiferous tubules are known as interstitial (in-ter-stish’-al) cells, and they produce male sex hormones.

Explanation:

when it is at an intermediate population density