Organs:  Blowhole, lungs, trachea, goosebeak

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Function:  Cannot breath underwater, so have to rise to surface to breath every minute or so exchanging gases through there blow holes.

 

Vocalization:  Clicking noises and some squeaking

 

Communication:  Dolphins have a very intricate communication system and are very intelligent they use small clicking noises that bounce and project to dolphins miles away.