Why do some animals have their skeletons on the outside?

Name: Why do some animals have their skeletons on the outside?
Uploaded: 2015-12-25T23:40:58+00:00
Duration: 4 min
Channel: Kids Zone
Description: A crabby pinch to the snout has Dawn curious about why a crab is hard on the outside! Building a exoskeleton is easy with old cardboard rolls, empty tissue

Kids Zone

A crabby pinch to the snout has Dawn curious about why a crab is hard on the outside! Building a exoskeleton is easy with old cardboard rolls, empty tissue

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