Sperm
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Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction. Sperm cells contribute approximately half of the nuclear genetic information to the diploid offspring. Anim
Motile sperm cell attempting to penetrate an ovum's coating to fertilize it.
Electron micrograph of human spermatozoa magnified 3140 times.
Human sperm stained for semen quality testing
Gametangium
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A gametangium is a sex organ or cell in which gametes are produced that is found in many multicellular protists, algae, fungi, and the gametophytes of plants. In contrast to gametogenesis in animals,
Light micrograph of a whole-mount slide of gametangia of Equisetum