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Glossary of Terms

Blastocyst
A very early stage of embryonic development. About 4-5 days after conception the embryo consists of a ring of cells with fluid in the center and a clump of cells at one end with a thinner layer of cells at the other end.
This is Children's Glossary of Medical Terms - and much more. You'll find the basic definitions and, for many medical subjects, a larger medical context written by an experienced Children's pediatrician. All the definitions are in an easy-to-print format.

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Date Last Modified: 08/25/2003 08:00