Canadian Medical Guide > Anatomy > Embryonic Structures > Embryo > Cleavage Stage, Ovum Terms and Definitions




Cleavage Stage, Ovum

Medical Definition: The embryo in its earliest stage, lasting from the first mitotic division of the fertilized ovum (ZYGOTE) into two BLASTOMERES to the formation of the MORULA, a compact mass of blastomeres.
Guide Notes: note category; "the embryo in its earliest stage"
Previously Indexed: Cell Division (1966-1979),Mitosis (1968-1979),Ovum (1966-1979),Zygote (1975-1979)
Cleavage Stage, Ovum Categories.
Canadian Medical Guide Definition Blastula - An early non-mammalian embryo (EMBRYO, NONMAMMALIAN) that follows the MORULA stage. Blastula is usually a spherical structure containing a single layer of cells with a hollow cavity.
Canadian Medical Guide Definition Morula - The early embryo at the developmental stage in which the BLASTOMERES, resulting from repeated mitotic divisions of the fertilized ovum (ZYGOTE), form a compact cell mass.

Cleavage Stage, Ovum Medical Definitions and Terms

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