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 ?
Trajectories observed under a microscope for each sperm cell showed a corresponding number of changes in orientation along the aperture.
Sperm motility (the ability to move forward to reach the egg), the volume of semen per ejaculate, and the number of normal sperm cells carrying undamaged DNA have diminished over the same time period.
The sperm cells show no tendency to form well ordered piles or globules either in the lumina of the testes or in the vasa deferentia.
Then the FAM-labeled oligonucleotides and the PEI/oligonucleotides mixture was added to the sperm cells, mixed, vortexed, spun down, and incubated at room temperature for 60 min.
It has been speculated that continual marijuana use may cause sperm cells to activate prematurely, in turn making them burn out quickly and rendering them unable to swim to the target.
ABSTRACT : The objective of this study was to compare random regression model and multiple trait animal model estimates of the (co) variance of total sperm cells over the active lifetime of AI boars.
Sperm morphology as well as immature sperm cell evaluation are important in spermatogenesis evaluation.
This particular sperm cell divides and contributes genes to the next generation.
This is the first time any type of cell from a human has grown into an early stage sperm cell," he said.
He discovered that a sperm cell that binds to hyaluronan is mature and has the capability to bind to and fertilize an egg.
Researchers knew that powerful sperm swimming depends on protons leaving the sperm cell, thereby lowering its acidity.