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Biology: Age 10
6 illustrated Biology lessons for Age 10.
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Warm Core, Cool Fingers Your body sends blood to the brain and heart first, so your hands and feet can feel cold. The tiny blood vesse… -
A Shell Built From Ribs A turtle's shell is made of its own bones. Its ribs grew wide and joined together, so the shell is part of its… -
Underwater Crocodile A crocodile can stay underwater with its nostril, eye, and throat closed tight. It swims by pushing with its w… -
Whales from the Shore Long ago, whale ancestors walked on land on four legs. Over millions of years, their legs became smaller, thei… -
Crocodile on a Sunny Bank A crocodile does not make enough body heat on its own, so it uses the sun and water to stay warm or cool. It l… -
How Seaweed Holds On and Drinks Seaweed has no roots, so it grips rocks with a knotted base called a holdfast, like a claw. It soaks up water …