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Question
When a fracture begins to heal, one type of bone cell moves into the fracture site and tears down the damaged bone tissue. Which of the following tears down bone?
Options:
A .  Osteoblasts
B .  Osteoclasts
C .  Osteon
D .  Osteocytes
Answer: Option B
:
B
Osteoclasts are large cells that dissolve the bone. They come from the bone marrow and are related to white blood cells. They are formed from two or more cells that fuse together, so the osteoclasts usually have more than one nucleus. They are found on the surface of the bone mineral next to the dissolving bone.

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