Step 1 : Introduction to the question "2. Cats and humans have skeletons made up of what?"
...1. Bone 2. Cellulose 3. Chitin 4. Water Most living organisms are made up of a structure system that gives their body support and resistance from collapsing. Without this support system, vital organs and internal matter would be vulnerable to damage and injure. The skeletal system can be made up of a variety of material, but the typical skeleton system in mammals, birds, reptiles, fishes and amphibians is made up of bone.
Step 2 : Answer to the question "2. Cats and humans have skeletons made up of what?"
Bone:
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