Which of the following is correct
Mesoderm produces brain
Ectoderm produces liver
Mesoderm produces skeleton
Endoderm produces heart
Blastopore is found in
Relaxin (a hormone) is secreted by
$A$ : In human, ovum is alecithal type.
$R$ : It is almost free of yolk
Embryo at $16$ -celled stage is called
Foetal membranes provide