HSEB notes
The general characteristics of Amphibian are as follows:
1. Habitat: They live both in land and water. They are cold blooded (poikilothermic) animal.
2. Sleeping period: They undergo hibernation (winter sleep) and aestivation (summer
sleep) period during unfavorable condition.
3. Body :
Their body is cylindrical and divided into head trunk and mobile neck. Their
head is triangular and bears pair of eye, external nosestril and tympanum. Eyes
are protected by nictitating membrame.
4. Locomotion: It takes place by pentadactyle fore and hind limbs. Claws are
absent. Fore limbs has 4 fingers and hind limb has 5 fingers with webbed and longer toes.
5. Nervous System: They have 12 pair of carnial nerve arising from brain.
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6. Reproduction system : Sexes are separate in
them(diocious) .
7. Development is indirect and fertilization is external.
Eg : Hyla, Rana(frog) ,
Toad(bufo) etc.
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