What are the structural features of the sperm?

Typically, sperm are very small cells. For example, the head length of a human sperm is only 4.5–5.5 μm. It consists of a head that is almost completely occupied by a nucleus with a haploid set of chromosomes; the neck, in which there is a structure similar in structure to centrioles, and mitochondria; tail formed by microtubules and providing mobility of the entire sperm. In the front of the sperm head is a modified Golgi complex called an acrosome. A special enzyme is stored in it, which is necessary for dissolving the egg shell, without which fertilization is impossible.

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