spermatozoon, pl. spermatozoa (sper´ma-to-zo´on, -zo´a)

The male gamete or sex cell that contains the genetic information to be transmitted by the male, exhibits autokinesia, and is able to effect zygosis with an ovum. The human s. is composed of a head and a tail, the tail being divisible into a neck, a middle piece, a principal piece, and an end piece; the head, 4 to 6 mum in length, is a broadly oval, flattened body containing the nucleus; the tail is about 55 mum in length.sperm (1) [NA] , sperm cell; [G. sperma, seed, + zoon, animal]


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