The Sex Organs - The Male Sex Organs

The Internal Sex Organs: The System of Genital Ducts

The Epididymides
The sperm cells which are constantly being produced in the seminiferous tubules are moved into collection tubes which lie on the surface of each testicle. Such a collection tube is called epididymis (plural: epididymides), and it is about ca. 6m (20 feet) long. However, it is so twisted and convoluted that it seems no longer than the testicle itself. A sperm cell needs several weeks to traverse the collection tube. During this time it develops a limited ability to move by itself.

Longitudinal section of a testicle showing the seminiferous tubules and the convoluted epididymis.