6 results for “bone”

1. Animals

   Mammals

   bones in the middle ear that evolved from reptile jaw bones, a diaphragm for breathing, and a large

   Article · 4 min read

   

2. Animals

   Birds

   bones are hollow, braced inside with struts like an aircraft wing; a frigatebird's skeleton weighs

   Article · 3 min read

   

3. Animals

   Whales and Dolphins

   bones as in a human arm and hand, and many whales still have tiny useless hip bones

   Article · 4 min read

   

4. Animals

   Sharks

   bones. Their skeleton is cartilage, the same flexible material that forms your nose and ears, which

   Article · 3 min read

   

5. Animals

   Insects

   bones inside, it wears its skeleton outside, a hard shell of a material called chitin. The exoskeleton

   Article · 3 min read

   

6. Animals

   Reptiles and Amphibians

   bone fused to the ribs and spine, a design unchanged for 200 million years; they are among

   Article · 3 min read