The structural and functional unit between developing embryo (foetus) and maternal body is called
Name the following :
(a) The fluid surrounding the developing embryo.
(b) The body part in which the embryo develops.
(c) The membrane which protects the foetus and encloses a fluid.
(d) the canal through which the testes descend into the scrotum just before birth in human male child.
Define foetus. After how many weeks of development, a human embryo is said to become a foetus?