Match the terms in column A with the descriptions in column B. Column A a. blastocystb. chorionic villic. ectodermd. endoderme. mesodermf. morulag. trophoblastColumn B 1. germ layer that gives rise to muscle and bone tissues2. hollow ball of cells3. cells forming wall of blastocyst4. solid ball of about sixteen cells5. inner germ layer of embryonic disk6. slender extensions that grow out from the trophoblast7. outer germ layer of embryonic disk

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