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The hyoid bone is the only bone in the adult body that doesn't articulate with another bone.
Bone marrows purpose is to protect the inside of your bone. Bone marrow is filled with blood cells and your bone marrow can get infected.
Cells comprise bone and muscle, they do not have bone and muscle in them.
Bone
The epiphysis is the end of long bones and they are made of hard bone on the outside and spongy bone on the inside.