A spermatozoon, commonly known as a sperm cell, is the male reproductive cell in sexually reproducing organisms. It is typically motile, meaning it can move, and is designed to fertilize the female egg, or ovum. Spermatozoa are produced in the male reproductive system, specifically in the testes, through a process called spermatogenesis. Structurally, a spermatozoon consists of three main parts: the head, midpiece, and tail. The head contains the genetic material, while the midpiece is packed with energy-producing mitochondria. The tail, or flagellum, propels the sperm forward, allowing it to swim through the female reproductive tract to reach the ovum for fertilization.