Sperm Cells

Some articles on cells, sperm cells, sperm:

Differential Extraction
... Differential extraction refers to the process by which the DNA from two different types of cells can be extracted without mixing their contents ... is the extraction of DNA from vaginal epithelial cells and sperm cells from sexual assault cases in order to determine the DNA profiles of the victim and ... Its success is based on the fact that sperm cells have protein disulfide bonds in their outer membrane which makes them more resilient to extraction than epithelial cells ...
Acrosome Reaction - In in Vitro Fertilization - Assessment
... microscopy can be used for assessing the shedding of the acrosome or "acrosome reaction" of a sperm sample ... Sperm cells with artificially induced acrosome reactions may serve as positive controls ... For fluorescence microscopy a smear of washed sperm cells are made, airdried, permealized and then stained ...
Spermophagia - Physiological Aspects - Composition of Human Semen
... During the process of ejaculation, sperm passes through the ejaculatory ducts and mixes with fluids from the seminal vesicles, the prostate, and the bulbourethral glands to form the semen ... Sertoli cells, which nurture and support developing spermatocytes, secrete a fluid into seminiferous tubules that helps transport sperm to the genital ducts ... The ductuli efferentes possess cuboidal cells with microvilli and lysosomal granules that modify the semen by reabsorbing some fluid ...
Spermatozoon - Spermatozoa in Other Organisms - Plants, Algae and Fungi
... ferns and some gymnosperms produce motile sperm cells, contrary to pollen grains employed in most gymnosperms and all angiosperms ... in the absence of water impossible, since water is a necessary medium for sperm and egg to meet ... Algae and lower plant sperm cells are often multi-flagellated (see image) and thus morphologically different from animal spermatozoa ...
Motile Sperm Cells
... Motile sperm cells typically move via flagella and require a water medium in order to swim toward the egg for fertilization ... In animals most of the energy for sperm motility is derived from the metabolism of fructose carried in the seminal fluid ... place in the mitochondria located in the sperm's midpiece (at the base of the sperm head) ...

Famous quotes containing the word cells:

    The twelve Cells for Incorrigibles ... are also carved out of the solid rock hill. On the walls of one of the cells human “liberty” is clearly inscribed, with the “liberty” in significant quotation marks.
    —Administration in the State of Ariz, U.S. public relief program (1935-1943)