Anatomy and Physiology I

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Cleavage

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Anatomy and Physiology I

Definition

Cleavage in embryonic development refers to the series of rapid cell divisions that occur after fertilization, transforming the single-celled zygote into a multicellular structure known as a blastula. These divisions do not increase the size of the embryo but increase the number of cells, partitioning the embryo's volume into smaller, multicellular units.

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