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Q: What is the outer layer of a bone? A: The periosteum is the outer layer of the bone.

Q: What is periosteum made of? A:Periosteum is made of membrane.

Q: What is the second layer of the bone? A: The second layer of the bone is compact bone.

Q: What is compact bone? A: Compact bone is smooth, hard and it is the part you see when you look at a skeleton.

Q: What is the third layer of a bone? A:The third layer of the bone is cancellous.

Q: What does cancellous look like? A: It looks like a sponge although it is hard.



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