Answers

2015-11-15T14:34:52+05:30
Dolphins respire as like human respire i.e. through lungs and also in crocodiles they both take oxygen from air and before to go under the water they take oxygen from air and use them about an hour.This respiration is called  branchial respiration
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2015-11-15T16:16:23+05:30
They respire through lungs n this is known as Brachial respiration.
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