Which of the following is correct
Mesoderm produces brain
Ectoderm produces liver
Mesoderm produces skeleton
Endoderm produces heart
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
The eutherian placenta is derived from or In mammals placenta is formed by
$A$ : Corticotrophin releasing hormone is a part of the clock that establishes the timing of birth.
$R$ : The signals for parturition originate from the fully developed foetus and placenta which induce mild uterine contractions called foetal ejection reflex.
Which of the following is similar in function to Cowper's gland
Sertoli cells are found in