Spermatozoa, commonly known as sperm, are the male reproductive cells in many organisms, including humans. They are produced in the testes through a process called spermatogenesis. Each spermatozoon has a head, which contains genetic material, a midpiece packed with energy-producing mitochondria, and a tail that helps it swim toward the egg. These cells play a crucial role in reproduction by fertilizing the female reproductive cell, or ovum. Spermatozoa are typically motile, allowing them to navigate through the female reproductive tract to reach the ovum. Successful fertilization leads to the formation of a zygote, which can develop into a new organism.