Question
Thu January 24, 2013 By:

what is the diffrence between reptiles and amphibians?

Expert Reply
Fri February 01, 2013

 

 

 

Amphibians live  two lives : one in water with gills and the other on land once they grow lungs with age. Amphibians usually have to stay near water sources to prevent drying out, and have smooth skin.

Reptiles are groups of animals that breathe air, have scales on their bodies , and lay eggs.

Examples:

Frog, toad, newts, salamanders

Snakes, lizards, crocodiles, turtles

Method of Breathing:

Gills and lungs

Lungs

Body Metabolism:

Ectothermic (cold-blooded)

Ectothermic (cold-Blooded)

Metamorphosis:

Yes. Breathes water through gills until it develops lungs.

No. Looks like a miniature adult when born.

Defense:

Toxic skin secretions and can bite. No claws or nails.

claws, whipping tails and bites (some have venom; Gila monster, beaded lizard)

Heart structure:

3-chambered

3-chambered

Limbs:

short fore limbs and long hind limbs with five webbed digits.

reptiles crawl or creep- as they have either weak short limbs or even no limbs.

Skin Texture:

Smooth, moist and sometimes rather sticky skin. Laden with mucous glands.

Dry and scaly. Scales are small folds in skin. Skin is found underneath the scales.

Eggs:

Have soft, gel surrounding their eggs without any hard covering. Usually, found in water or damp places.

Amniotic egg. Have hard, leathery eggs laid on land or they keep eggs in their bodies until they hatch.

Amphibians breathe under water through gills until they develop lungs later on in life, whereas  crocodiles are born resembling miniature adult crocs with already working lungs ready to breathe air from day one.  Also their skin is dry and scaly unlike the smooth, moist and rather sticky skin texture of amphibians. All the other features of crocodiles resemble reptiles and not amphibians.

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