Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell ...

The tail enables the sperm to swim. The nerve cell is extended, so that nerves can run to and from different parts of the body to the central nervous system. The cell has extensions and branches ...

Next, the mitochondrial structure in the sperm's tail is broken down ... Furthermore, just as happens inside immune cells that target microbes, LAP's final step in the egg involves the recruitment ...