NCBI Bookshelf. Molecular Biology of the Cell. New York: Garland Science; In most species, there are just two types of gamete , and they are radically different. The egg is among the largest cells in an organism, while the sperm spermatozoon , plural spermatozoa is often the smallest. The egg and the sperm are optimized in opposite ways for the propagation of the genes they carry.
Sperm and eggs: the basics of human sex cells
Nine Things You Never Knew About Sperm (PHOTOS) | HuffPost
Every sperm is great. In fact, the average male will produce roughly billion sperm cells over a lifetime and shed at least one billion of them per month. A healthy adult male can release between 40 million and 1. In contrast, women are born with an average 2 million egg follicles, the reproductive structures that give rise to eggs. By puberty, a majority of those follicles close up and only about will ever release mature eggs for fertilization. But if it only takes one sperm and one egg to meet and create a baby, then why do men produce such a whopping number of sperm?
Sperm , also called spermatozoon , plural spermatozoa , male reproductive cell , produced by most animals. With the exception of nematode worms, decapods e. In higher vertebrates, especially mammals, sperm are produced in the testes.
Sperm cells are gametes sex cells that are produced in the testicular organ gonad of male human beings and animals. Like the female gamete Oocyte , sperm cells carry a total of 23 chromosomes that are a result of a process known as meiosis. In both animals and human beings, among many other organisms, these cells are involved in the sexual mode of reproduction which involves the interaction of male and female gametes.