Epididymis: Anatomy, Sperm Maturation & Storage

Structure

The epididymis is a long, coiled tube connecting testis to vas deferens, divided into three regions:

• Caput (head) – near testis; initial sperm maturation.
• Corpus (body) – further maturation; storage.
• Cauda (tail) – near vas deferens; final maturation; storage of mature sperm.

Functions

1. Maturation – provides optimal temperature, pH, nutrients for sperm to gain motility/fertility.
2. Storage – holds mature sperm for weeks until ejaculation.
3. Transport – moves sperm to vas deferens.

Essential for male fertility.