sperm cell

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, pl.


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 oocyte. The human sperm 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, 4-6 mcm in length, is a broadly oval, flattened body containing the nucleus; the tail is about 55 mcm in length.
Synonym(s): sperm cell, spermatozoon
[G. sperma, seed]

sperm cell

See sperm1.
References in periodicals archive ?
Ascorbic acid addition in Tris egg yolk extender also improved sperm cell membrane integrity of sahiwal cattle bulls shown in Table I.
The increase in voltage from the original level to a higher level indicated the volume of a sperm cell.
Once the nucleus of the sperm cell enters the oocyte, it decondenses.
Branching somatic cells forming a meshwork constitute the germinal part in which groups of sperm cells are embedded (Fig.
Polymerase Chain Reaction (PCR) technology was used to testify whether PEI can carry DNA into abalone sperm cells or not.
Consequently, when a sperm cell entered an egg cell in the process of fertilization, the chromosomes reached their normal number for the species, half of them coming from the mother and half from the father.
They discovered that among healthy adult males who were not being treated for infertility, the average sperm count had declined by about 40 percent, from 120 million sperm cells per milliliter of semen to about 70 million.
To complete the picture, two such somatic protective cells surround each maturing sperm cell, and those encysting somatic cells send signals to the sperm cell on how and when to mature.
Washington, Feb 12 ( ANI ): Doctors may soon have a new technique to help them sort the good sperm cells from the less viable ones: a tracking system, developed by a team of researchers from four European institutions, that takes 3-D movies of living sperm.