1) What do osteocytes maintain? a) Muscle content b) Mineral content c) Water balance d) Protein levels 2) What is NOT a bone tissue? a) Compact bone b) Spongy bone c) Cartilage d) Bone marrow 3) What fills some cavities in spongy bone? a) Blood b) Nerves c) Bone marrow d) Periosteum 4) What surrounds bones? a) Muscles b) Periosteum c) Skin d) Ligaments 5) What replaces cartilage during development? a) Muscle b) Bone c) Fat d) Skin 6) What do Haversian canals contain? a) Nerves b) Muscles c) Blood vessels d) Lymph

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