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.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.