ਅੱਸੀ ਅੱਜ ਦੀ ਇਸਤਰੀ ਇਨ ਪੰਜਾਬੀ
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Four types of cells compose bony tissue: osteocytes, osteoclasts, osteoprogenitor cells, and osteoblasts. Ossification is the process of bone formation by osteoblasts. ... Long bones lengthen as chondrocytes divide and secrete hyaline cartilage. Osteoblasts replace cartilage with bone.
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