Dr.Jo's Amazing Science
MORE FACTS ABOUT DOLPHINS
DOLPHINS AREN'T FISH, THEY ARE MAMMALS THAT BREATHE AIR.
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They have lungs, not gills.
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A dolphin breathes through a blowhole on the top of it’s head.
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It comes up to the water surface of to get air.
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Dolphins breathe around 4 or 5 times a minute.
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Humans breathe around 12-16 times a minute.
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BENEFITS OF HALF-BRAINED SLEEPING
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The half that’s awake makes dolphins:
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Come up for air.
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Sleeping dolphins come up for air several times a minute.
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Stay close to other dolphins.
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They may swim in pods of 1000 other dolphins.
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Keep one eye out for danger.
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Killer whales (killer whales are a large species of dolphin) prey on dolphins.
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THE TWO HALVES OF THE BRAIN TAKE TURNS SLEEPING.
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When the left side of the brain sleeps, the right eye closes.
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When the right side of the brain sleeps, the left eye closes.
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Messages from each eye go to the opposite side of the brain.
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Dolphins sleep while slowly swimming near the surface of the water,
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Other half-brain sleepers include
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Mallard ducks
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Pigeons
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Northern fur seals
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Great frigate birds, while flying in a flock.
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