Score :
Fails (6):

Friday, March 2, 2012


In many species the male is smaller and slimmer than the female. Males have vocal cords and make a range of croaks, particularly in the breeding season, and in some species they also have vocal sacs to amplify the sound. In the male the two testes are attached to the kidneys and sperm passes into the kidneys through fine tubes called efferent ducts. They then travel through the ureters which are consequently called urinogenital ducts in the male frog. There is no penis and sperm are ejected from the cloaca directly onto the eggs that the female is laying during amplexus. The ovaries of the female frog are also beside the kidneys and the eggs pass down a pair of oviducts to the exterior. During amplexus, the firm grip of the male frog stimulates the release of eggs, usually wrapped in jelly, as spawn

Tadpoles grow up to be frogs

No comments:

Post a Comment