The structural and functional unit formed between the embryo and the maternal body is called .......

The three germ layers—ectoderm,endoderm,and mesoderm—are formed by the division of the embryo. Identify the error in the given statement regarding the process of organogenesis mediated by stem cells.

Corpus luteum is the source of secretion of

The temporary endocrine gland in the human body is the ...

How many cleavages are required to form a $16$-celled blastomere?

The foetus is nourished by: