what are testes
The testes (singular: testis), commonly known as the testicles, are a pair of ovoid glandular organs that are central to the function of the male reproductive system.The testes are responsible for the production of sperm cells and the male sex hormone testosterone.The testes produce as many as 12 trillion sperm in a male's lifetime, about 400 million of which are released in a single ejaculation.Located in the hollow sac of the scrotum, each testis is about 1.5 to 2 inches long along its long axis and around 1 inch in diameter....Click to read more below.he testes produce as many as 12 trillion sperm in a male's lifetime, about 400 million of which are released in a single ejaculation. Located in the hollow sac of the scrotum, each testis is about 1.5 to 2 inches long along its long axis and around 1 inch in diameter.... Click to read more below.