[ noun ]
■ double-walled stage of the embryo resulting from invagination of the blastula
■ the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
※ You can download Most Useful English Words 15000 for free after posting your review!
To download this contents, you need to post your reviews for items about English learning. You can download it for free after posting your reviews.