Sperm (cell): male gamete composed of a head and a flagellum.
Acrosome: organelle situated a the point of the head of a spermatozoid.
Neck: part of a spermatozoid between the head and the body.
Tail: end of a spermatozoid.
Middle piece: main part of a spermatozoid.
Head: important end of a spermatozoid.