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Celia Frog Development
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Published on Nov 28, 2015
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PRESENTATION OUTLINE
1.
STAGES OF DEVELOPMENT IN A FROG
Fertilized egg
Tadpole
Tadpole with small legs
Young frog
Adult frog
Photo by
USFWS Endangered Species
2.
Egg Stage
The male frog fertilizes the eggs as they are laid in the water.
The eggs are laid in huge clumps, which help protect them.
The egg starts as a single cell, then is surrounded by a jelly-like covering.
The single cell starts splitting until it has lots of cells.
These cells combine to form an embryo. The embryo then grows organs and gills.
Pie
Photo by
Ronnie
3.
TADPOLE
After the embryo leaves its jelly shell, it attaches itself to a weed.
Then it stays there, developing until it's big enough to break free.
It is very vulnerable, so it uses camouflage to protect itself.
The tadpoles eat tiny plants called algae.
The tadpoles live in the water and have long tails and gills to breathe.
Photo by
Jordi Payà Canals
4.
TADPOLE WITH LEGS
After 5 weeks, the tadpole starts developing back legs.
They then start developing front legs and lungs.
The tail gets smaller, and they start coming to the surface to breathe.
The tadpole now eats plants and decaying animal matter.
Some frogs eat frog eggs and other tadpoles at this stage.
Photo by
kahunapulej
5.
YOUNG FROG
The tail is almost gone, and the legs have grown a lot.
It has shed its skin and lips at this point.
Frogs usually eat their shed skin.
The frog will stop eating plants at this stage.
It's lungs are almost functioning now.
Photo by
Geoff S.
6.
ADULT FROG
After about 11 weeks after the egg was laid, it will be an adult frog.
It will live mostly on land now, going in the water sometimes.
It will have legs, lungs, and no tail at this stage.
The frog will eat insects and worms now.
Eventually, it will find a mate and start the whole process over.
Photo by
Todd W Pierson
7.
THANKS FOR WATCHING!
Photo by
wackybadger
Tad Dippel
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