The testes are a very important organ important in the male reproductive system. The function of the testes is to produce sperm and the hormone testosterone. Because of its important role, testicular health must always be maintained, in order to avoid a variety of disorders. Each man has a pair of testicles, which are about 5 cm long. The testicles grow in the early stages of puberty, which is around the age of 10 to 13 years. As the testicles grow, the skin covering the testicles known as the scrotum will be darker, overgrown with hair, and hanging down. Facts About Testes Unlike women who have reproductive organs located inside the pelvis, men have reproductive organs that are inside and outside the pelvis. Male reproductive organs include the testes, the duct system consisting of the epididymis and vas deferens, the accessory glands which include the seminal vesicles and prostate gland, and the penis. All of these parts have their respective functions and roles. Testes have a