class amphibia
—Frogs and toads, salamanders and newts, caecilians
—Modern amphibians share these characteristics: ◦Most change from an aquatic larval stage to terrestrial adult stage (metamorphosis) ◦Moist, thick skin without scales ◦Feet (if present) lack claws and are often webbed ◦Use gills or lungs and skin in respiration ◦Eggs without shells, fertilized externally, laid in or near water |
1. They move using their tails as larva through the water and their legs as adults.
2. They have a closed circulatory system with a 3 chambered heart.
3. They poses bilateral symmetry.
4. They have gills when larva and lungs when adults they also breath through their skin.
5. They feed on just about anything that will fit in their mouths.
6. They have kidneys which filter waste and a cloaca which disposes of it.
7. They have a brain and a spinal cord which makes up their nervous system.
8. they have an internal bony skeleton which provides support.
2. They have a closed circulatory system with a 3 chambered heart.
3. They poses bilateral symmetry.
4. They have gills when larva and lungs when adults they also breath through their skin.
5. They feed on just about anything that will fit in their mouths.
6. They have kidneys which filter waste and a cloaca which disposes of it.
7. They have a brain and a spinal cord which makes up their nervous system.
8. they have an internal bony skeleton which provides support.