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Origin of Amphibia ( Class Amphibia)
SUBJECT : Zoology
AUTHOR : Vimala C M
PUBLISHED ON : 01/07/13
NUMBER OF PAGES : ( 5 Pages)
PRICE : Rs 3.75

Amphibians are the first forms that ventured on to the land. They developed a smooth skin, and lungs for breathing air. The other physiological and anatomical changes were seen in the circulatory system and the development of eyelids and the middle ear (tympanum). The amphibians reduced their body weight by fusion of bones and developed limbs that could support them on land.

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