Polar body

Polar body

The small abortive cells with a haploid chromosome complement, consisting of a tiny piece of cytoplasm and a nucleus, resulting from an unequal division of the primary oocyte.

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Part of Speech: noun
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Industry/Domain: Anatomy
Category: Developmental anatomy
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polar body

Anatomy; Developmental anatomy

The small abortive cells with a haploid chromosome complement, consisting of a tiny piece of cytoplasm and a nucleus, resulting from an unequal division of the primary oocyte.

polar bodies

Anthropology; Cultural anthropology

Cells that develop in oogenesis, contain little cytoplasm, and do not develop into mature ova.

polar bodies

Biotechnology; Genetic engineering

In female animals, the products of a meiotic division that do not develop into an ovum. The first polar body comprises one of the two products of meiosis I, and it may not go ...

polar body

Medical devices; OBGYN equipment

The discarded genetic material resulting from female germ cell division. See also Meiosis.

polar bodies

Medical; Health care; Medicine

Minute cells produced during development of an oocyte as it undergoes meiosis. A polar body contains one of the nuclei derived from the first or second meiotic cell division. ...

polar body

Medical; Health care; Medicine

Minute cells produced during development of an oocyte as it undergoes meiosis. A polar body contains one of the nuclei derived from the first or second meiotic cell division. ...

trophoblast

Anatomy; Developmental anatomy

A granular protoplasmic body; a plastid, formed from cytotrophoblast, eventually surrounds the entire embryo; insert themselves between uterine epithelial cells, then spread along ...

ventralward

Anatomy; Developmental anatomy

Toward a belly, venter, or ventral aspect.

vertex

Anatomy; Developmental anatomy

The top or crown of the head.

yolk sac

Anatomy; Developmental anatomy

The yolk sac in man contains no nutrients so in this aspect is vestigial. However, the its embryonic endodermal roof is the source of the mucous membrane of almost the entire ...

zona pellucida

Anatomy; Developmental anatomy

A thick, transparent, noncellular layer or envelope of uniform thickness surrounding an oocyte. Also called the oolemma.

segmentation cavity

Anatomy; Developmental anatomy

The fluid-filled cavity of the mass of cells produced by cleavage of a fertilized ovum.

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