Mention the characteristics of amphibians.

Mention the characteristics of amphibians.
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Answer :

a) Amphibians are the first vertebrates to appear on land.

b) They have adaptations to live both in water and on land.

c) The body is divided into head, trunk and tail. Tail is absent in adult stage.

d) The skin is smooth and moist.

e) Locomotory organs are in the form of fore and hind limbs. Fore limbs have four digits

each and hind limbs have five digits each.

f) Respiratory organs are gills in larva stage, lungs, skin in adult stage.

g) They are cold blooded animals with a three chambered heart.

h) Nervous system consists of brain, spinal cord and 10 pairs of cranial nerves.

i) They are oviparous animals & fertilization is external.

j) They exhibit metamorphosis.

Ex: Frog, Toad, Salamander, Newt, Ichthyophis (apodan)
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