Home Shop Freebies Info DolphinHut
Dolphin Info  
Sponsored Links
Sign up for the Dolphin Hut Newsletter. Your email will not be shared with other parties.

How Dolphins Breathe

Bottle-nose dolphins breathe through their blowhole, which is a specialized single nostril, located at the top of their head. A dolphin may empty and refill its lungs in less than a fifth of a second. As the dolphin breathes the air leaves the blowhole at speeds of over 100 mph. Complex nerve endings around the blowhole sense pressure changes so the dolphin knows exactly when the blowholeis in or nearing air and can be opened. Water in a dolphin's blowhole will actually drown it so powerful muscles close the blowhole as it dives under the water again.

Although dolphins may take a breath of air on the average of 2 to 3 per minute, they can hold their breath for periods in excess of 10 minutes. Dolphins open its blowhole and begins to exhale just before reaching the surface of the water. At the surface, the dolphin quickly inhales and relaxes the muscular flap to close it.

As the dolphin exhales, seawater that has collected around the blowhole is carried up with the respiratory gases. Seawater and the water vapor condensing in the respiratory gases as they expand in the cooler air form the visible blow of a dolphin. During each respiration a dolphin exchanges 80 percent or more of its lung air. This is much more efficient than humans, who exchange only about 17 percent of their with each breath. Exhaling and inhaling takes about 0.3 seconds.

Dolphin Info:  
» Dolphin Facts  
» Dolphin Body  
» Dolphin Species  
» Dolphin Behavior  
» Communicating  
» Dolphin Diet  
» Eating Methods  
» Dolphin Evolution  
» Breathing  
» Dolphin Intelligence  
» Dolphin Interacting  
» Pink Dolphin  
» Body Language  
» Sleeping  
» Social Behavior  
» Vocalizing  
» Dolphins & Whales