The respiratory organs of larger aquatic animals are

Tracheae

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Lungs

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Gills

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Book lungs

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Solution

The correct option is C Gills
Gills are the respiratory organs of large aquatic animals. These organs are specifically adapted to their function. In Osteichthyes, the gills have four gill arches, Chondrichthyes have two, fish has 7 gill baskets with a long bony cover for the gills which is used to push water.

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State the three common features of all the respiratory organs like skin, gills and lungs.

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