Stages Of Frog Development

In pseudocopulation or mating the male frog firmly clasps the body of the female frog by his forelegs and enlarged thumb pads nuptial pads.

Stages of frog development. Body shows distinct head trunk and tail regions. They transition from having gills and no limbs to having lungs and hopping around the ground. A frog begins life as a fertilized egg. Interestingly a few species actually bypass the egg stage and give birth directly to live frogs or tadpoles.

When the tadpole hatches it looks more like a fish than a frog. During metamorphosis two hormones prolactin and thyroxine control the transformation from egg to larva to adult. The complete growth cycle of the frog generally takes between 12 and 16 weeks. The eggs float on water in a jelly mass or cluster.

The newly hatched tadpole is a small blackish fish like creature about 5 7 mm long. Frogs lay their eggs in water in early spring. The life cycle of a frog begins when the male frog mates with the female and fertilizes her eggs. Hatching occurs about 2 weeks after fertilization.

It doesn t have any legs. A female frog lays a lot of eggs at one time in a pond. The various organs of the larval body develop from these three layers. As the frog grows it moves through these stages in a process known as metamorphosis.

The life cycle of a frog consists of three stages. This sexual embrace is called amplexus. The three layers the ectoderm mesoderm and endoderm are also known as primary germ layers. Egg larva and adult.

After hatching the free larval stages of frog are known as tadpoles. Frogs are not the only animals to undergo metamorphosis. The developmental stages of most frogs are the egg stage various tadpole stages the froglet stage and the adult frog stage. These nuptial pads help in clasping the body of female.