polar body
one product of oogenesis; extruded as a small, nonfunctional haploid product with very little cytoplasm
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Polar body
[Gr. polos - a pole; L. corpus - body]. A minute cell formed during the first and/or second meiotic divisions of oogenesis that contain a nucleus but very little cytoplasm and which eventually degenerate.
polar body
Minute, nonfunctioning cell produced during those meiotic divisions that lead to egg cells; contains a nucleus but very little cytoplasm.
polar covalent bond ...
This second division is also unequal, producing a large cell which constitutes the mature ovum, and a small cell, the second polar body.
Soon the nucleus of the successful sperm enlarges into the male pronucleus. At the same time, the egg (secondary oocyte) completes meiosis II forming a second polar body and the female pronucleus.
Digyny is most commonly caused by either failure of one meiotic division during oogenesis leading to a diploid oocyte or failure to extrude one polar body from the oocyte.
During the first meiotic division, a large secondary oocyte and a small polar body are produced. The secondary oocyte will divide to produce an egg and a polar body. The first polar body may divide to produce two more polar bodies.
ootid Stage of formation of ovum after second meiotic division following expulsion of second polar body.
ootype Part of oviduct in flatworms that receives ducts from vitelline glands and Mehlis' gland.
Depolarisation of membrane / blocks entry of more sperm
2° oocyte undergoes 2nd division of meiosis / produces ovum + second polar body
Nuclei (ovum + sperm) fuse forming a zygote
Female Infertility ...
 See also: Cell, Egg, Cells, Embryo, Division
  
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