Placenta acts as an
Endocrine gland
Exocrine gland
Apocrine gland
Merocrine gland
Placenta release oestrogens, progesterone, $H C G$ and relaxin. That's why it can be considered as endocrine gland
Placenta secretes
Cells of leydig are found in
Nervous system in vertebrates develops from
$A$ : Failure of testes to descend into the scrotum causes sterility in man. $R$ : Higher internal body temperature is not suitable for sperm development.
In rabbit, the uterus is
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