Sperm cells are highly specialized cells that are able to move. Each sperm cell must be able to deliver a haploid set of chromosomes from the male to an egg cell in the female reproductive tract. The structure of a mature sperm cell is well adapted to its function. Almost the entire head of the sperm is the haploid nucleus, the all-important genetic information that is delivered to the egg. Attached to the head of the sperm is a long tail that propels the sperm along. Also present are large numbers of mito- chondria that produce ATP, which yields the energy the sperm use to pro- pel themselves.
