Blastocyst



the blastula of the mammalian embryo, consisting of an inner cell mass, a cavity, and an outer layer, the trophoblast.
noun (embryol)
Also called blastosphere. the blastula of mammals: a sphere of cells (trophoblast) enclosing an inner mass of cells and a fluid-filled cavity (blastocoel)
another name for germinal vesicle
n.
blas’to·cys’tic adj.
blastocyst
(blās’tə-sĭst’)
The modified blastula that is characteristic of placental mammals. It has an outer layer, known as a trophoblast, that participates in the development of the placenta. The inner layer of cells develops into the embryo.

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  • Blastoderm

    the primitive layer of cells that results from the segmentation of the ovum. the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity or a yolk mass. Historical Examples The British Woodlice Wilfred Mark Webb Form and Function E. S. (Edward Stuart) Russell The Works of Francis Maitland […]

  • Blastodermic-vesicle

    blastodermic vesicle Historical Examples The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour



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