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sperm cell


  • WordNet 3.6
    • n sperm cell the male reproductive cell; the male gamete "a sperm is mostly a nucleus surrounded by little other cellular material"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The largest cell in the human body is the female ovum, or egg cell. It is about 1/180 inch in diameter. The smallest cell in the human body is the male sperm. It takes about 175,000 sperm cells to weigh as much as a single egg cell.
    • Sperm cell (Physiol) one of the cells from which the spermatozoids are developed.
    • ***


In literature:

Allbutt, Prof. Clifford, on sperm-cells.
"More Letters of Charles Darwin Volume II" by Charles Darwin
The female, whether bird or beast, forms a true egg which must be fertilized by the male sperm cell before the offspring can develop.
"The Dollar Hen" by Milo M. Hastings
Sperm Cell and Germ Cell.
"Studies in the Psychology of Sex, Volume 5 (of 6)" by Havelock Ellis
An individual which produces both sperm-and egg-cells within its body is termed an hermaphrodite.
"Taboo and Genetics" by Melvin Moses Knight, Iva Lowther Peters, and Phyllis Mary Blanchard
Imparting the vital principle of the sperm-cell to the germ-cell, by which a new being is created.
"The People's Common Sense Medical Adviser in Plain English" by R. V. Pierce
A mature sperm-cell, with 2 chromosomes.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
There are no blood cells in a sperm, and I don't think there are any in an ovum.
"The Galaxy Primes" by Edward Elmer Smith
If the sperm-cell travels to the ovarium it generally takes from three to five days to make the journey.
"Searchlights on Health: Light on Dark Corners" by B.G. Jefferis
In physical science we know the vital force exists which builds the germ and sperm cells, but we do not comprehend it.
"The Christian Foundation, Or, Scientific and Religious Journal, Volume 1, January, 1880" by Various
The sperm-cells swim in the water, and are chemically attracted by the eggs.
"More Science From an Easy Chair" by Sir E. Ray (Edwin Ray) Lankester
The egg cell and the sperm cell fuse together.
"The Meaning of Evolution" by Samuel Christian Schmucker
It is essentially the same in the egg and in the sperm cells.
"A Critique of the Theory of Evolution" by Thomas Hunt Morgan
Essentially, it consists merely in the fact that the male sperm-cell coalesces with the female egg-cell.
"Homo-culture" by Martin Luther Holbrook
It is only found in egg and sperm cells, and in cancer cells.
"Syndrome" by Thomas Hoover
Eggs are produced in the lower one, the ovary, and sperm cells in the upper one, the spermary.
"A Guide for the Study of Animals" by Worrallo Whitney
Each consists of a mass of sperm-mother cells, in which the spermatozoa originate in large numbers.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
That is to say, the cell from the male (the sperm) must fuse with the cell in the female (the ovum).
"Embryology" by Gerald R. Leighton
Egg-cell and sperm-cell contrasted, 29.
"Being Well-Born" by Michael F. Guyer
Use of chart to show part played by egg and sperm cell.
"A Civic Biology" by George William Hunter
In the sexual mode of reproduction, male or sperm-cells and female or egg-cells are developed in the same individual.
"Elementary Zoology, Second Edition" by Vernon L. Kellogg

In news:

Sperm made from stem cells could aid men with fertility problems.
A new study from Portland State University shows that mosses produce sex-specific scent compounds that attract the springtail to carry sperm cells from male moss to female moss.
In nuclear transfer for infertility, the nuclei transferred are not from adult cells but from the sperm and egg of the people who are trying to become parents.
In nuclear transfer for infertility, the nuclei transferred are not from adult cells but from the sperm and egg of the people who are trying to become parents.
Cell phones may damage sperm, study claims.
Scientists create synthetic sperm cells.
Cell phones may damage sperm, study claims.
Stem cell op may 'restore sperm'.
Researchers at the University of Pittsburgh implanted frozen sperm-producing stem cells back into lab monkeys after they had undergone chemotherapy treatments.
Human Sperm and Egg Cells.
After a sperm fertilizes an egg, cells divide in a stage called a blastocyst.
Study Shows Females Can Delay the Aging of Sperm Cells for Decades.
However, in a new study on monkeys, researchers from the University of Pittsburgh and the Magee-Womens Research Institute extracted sperm-producing stem cells before cancer treatment and later restored the cells.
Why are men so bad at making sperm cells.
British scientist claim to create human sperm from stem cells.

In science:

These hair-like appendages of many cells are used for swimming and self-propulsion by sperm and some small organisms or to stir fluids surrounding a cell or cell layer.
Mechanical oscillations at the cellular scale
Many microorganisms are able to propel themselves, bacteria, sperm cells, microalgae, etc. A quantitative understanding of the hydrodynamics of flagella and cilia is thus of great interest [2, 3].
The random walk of a low-Reynolds-number swimmer
We ignore some complications of reality at represent the paternal genome in a sperm cell by one bit-string, and the maternal genome in the egg cell by another bit-string.
The Penna Model of Biological Aging
Scharf (as cited on page 91 of Stauffer et al 2006) offered the additional argument of pre-selection: Only the fastest sperm cell can fertilize the egg cell, and cells with bad mutations may move slower and thus are less likely to enter the egg cell.
The Penna Model of Biological Aging
This Darwinian preselection of the fittest sperm cell does not exist for asexual reproduction and may justify the existence of men.
The Penna Model of Biological Aging
When exposed to bright light, the alga swims in reverse, with its two flagella extended and propagating bending waves away from the cell body as in the case of sperm cells described above .
The hydrodynamics of swimming microorganisms
Recently, sea urchin sperm cells were observed to arrange into periodic vortices [171].
The hydrodynamics of swimming microorganisms
Howard. A self-organized vortex array of hydrodynamically entrained sperm cells.
The hydrodynamics of swimming microorganisms
In such a population nearly all individuals have the same bit-strings A and A’ in their diploid genome, thus producing haploid gametes (ovum and sperm cells) of one type only, either A or A’.
Review of haplotype complementarity under mutational pressure
The same happens with ovum and sperm cell both of type A’.
Review of haplotype complementarity under mutational pressure
If we assume that each of our 22 pairs of autosomes has complementing clusters of genes, then an ovum would have extremely low chance to find a fully complementing sperm cell (2−22 ).
Review of haplotype complementarity under mutational pressure
If an ovum could choose such a sperm cell, it should have a pool of at least 2−22 sperm cells.
Review of haplotype complementarity under mutational pressure