Multiple choice

Which among these breathe through a nasal opening called blowhole?

  1. Mangroves

  2. Fish

  3. Earthworms

  4. Penguins

  5. Dolphins
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Dolphins breathe through a hole at their top which is called blowhole. The blowhole is the external opening (like a nasal passage) to the lungs. Through its blowhole the dolphin inhales air containing vital oxygen and exhales respiratory wastes including carbon dioxide.

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