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Contrast the orbits of comets and asteroids.
Dense Bone
Dense or compact bone is a hard, outer layer of bone that provides strength and protection.
Spongy Bone
A type of bone tissue that has a porous structure, providing flexibility and acting as a shock absorber within bones.
Compact Bone
A dense and strong type of bone tissue that forms the outer layer of bones, providing structural support and protection.
Osteons
Structural units found in compact bone, consisting of a central canal surrounded by concentric rings of calcified matrix.
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