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sperm
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human sperm cells Sperm angiosperm life cycle
Follow the development of rice-paddy fish from fertilization to hatching in a laboratory setting
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sperm summary
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Male muscle, man flexing arm, bicep curl.
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Muscles of facial expression, human anatomy, (Netter replacement project - SSC). Human face, human head.
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human sperm cells
human sperm cells Sperm cells (magnified 1,000 times).

sperm

physiology
Also known as: spermatozoa, spermatozoan, spermatozoon
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sperm, male reproductive cell, produced by most animals. With the exception of nematode worms, decapods (e.g., crayfish), diplopods (e.g., millipedes), and mites, sperm are flagellated; that is, they have a whiplike tail. In higher vertebrates, especially mammals, sperm are produced in the testes. The sperm unites with (fertilizes) an ovum (egg) of the female to produce a new offspring. Mature sperm have two distinguishable parts, a head and a tail. The head of the sperm...

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