Explain reproductive system of frog with diagram.

Explanation

Frogs have well organised male and female reproductive systems. Male reproductive System : Male reproductive system consists of a pair of yellowish ovoid testes which are found adhered to the upper part of kidneys by a double fold of peritoneum called mesorchium. Vasa efferentia are 10-12 in number that arise from testes. They enter the kidneys on their side and open into Bidder’s canal. Now ureter is known as urino genital duct. It comes out from the kidney and opens into cloaca. The cloaca is a small median chamber that is used to pass faecal matter, urine and sperms to the exterior. Female reproductive System : The female reproductive organs include a pair of ovaries which are situated near kidneys and there is no functional connection with kidneys. A pair of oviduct arising from the ovaries opens into the cloaca separately. A mature female can lay 2500 to 3000 ova at a time. Fertilisation is external and takes place in water. Development involves a larval stage called tadpole. Tadpole undergoes metamorphosis to form the adult.