Features
|
Amphibians
|
Reptiles
|
Group
|
They come under class Amphibia
|
They come under class Reptilia
|
Habit and habitat
|
They usually stay near water sources to prevent drying
out, and have smooth skin.
|
They are groups of animals that breathe air, have scales
on their bodies, and lay eggs.
|
Breathing
|
Gills, skin and lungs
|
Lungs
|
Metabolism
|
Ectothermic (Poikilothermic or cold-blooded)
|
Ectothermic (Poikilothermic or cold-Blooded)
|
Metamorphosis
|
Yes. Breathes water through gills until it develops
lungs.
|
No. Looks like a miniature adult when born.
|
Heart
|
3-chambered.
Two atria and one ventricle
|
3-chambered, two atria and one ventricle. But ventricle is
partially divided.
Crocodiles have 4-chambered heart.
|
Limbs
|
Short fore- limbs and long hind limbs. They are generally
pentadactyl (with five webbed digits).
|
Four limbs are present (except snakes).
|
Skin
|
Smooth, moist, rather sticky skin. Mucous glands are present.
|
Dry and scaly. Scales are made of keratin. Skin is found
underneath the scales.
|
Eggs
|
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.
|
Reproduction
|
Sexual. External fertilization
|
Sexual. Internal fertilization
|
Examples
|
Frogs, toads, newts, salamanders, caecilians or
blindworms etc
|
Snakes, lizards, crocodiles, turtles
|
10:50:00 PM
Dr. Kazi Abdus Sobur
Zoology
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