Final answer:
Osteoblasts build bones, osteoclasts break them down.
Explanation:
Osteoblasts are considered the primary bone-building cells responsible for bone formation. They synthesize and secrete the extracellular matrix of bone tissue, including collagen fibers, and differentiate into osteocytes once trapped in the matrix. On the other hand, osteoclasts are responsible for bone resorption, breaking down bone structure by releasing enzymes and acids.
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