Biology / Bio 3085 · Atom · ~20 seconds
Endoskeleton Structure Overview
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An endoskeleton is an internal framework of bone or cartilage that grows with the body continuously, providing attachment points for muscles that pull against it from outside.
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A growing child's skeleton enlarges gradually alongside surrounding tissue, unlike an arthropod's staged molt.
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An endoskeleton still requires muscle to move it — the skeleton itself provides no motive force.