Spermatozoa

**Definition:** Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.

**Tree numbers:** - A05.360.490.890 - A11.497.760

**Synonyms:** - Sperm - Spermatozoon