majë

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.

trofoblaste

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.

zgavër segmentimit

Anatomy; Developmental anatomy

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

segment

Anatomy; Developmental anatomy

One of the paired, block like masses of mesoderm, arranged segmentally alongside the neural tube of the embryo, forming the vertebral column and segmental musculature.

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Actividade/ Sector: Holiday Category: Unofficial holidays

Smokeout Great American

Observed every year since 1977, the Great American Smokeout takes place on the third Thursday of November. Sponsored by the American Cancer Society, ...