What is the correct sequence of steps in bone repair?
1. Cartilage in the external callus is replaced by bone
2. A hematoma occurs
3. An internal callus forms at the site of injury
4. Osteoclasts and osteoblasts remodel the bone at the site of repair
A. 4,2,3,1
B. 2,1,3,4
C. 2,3,1,4
D. 1,2,3,4
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Which of the following steps of intramembranous ossification is correct ?
1. clusters of oestoblasts from oestoid that becomes mineralized
2. oesteoblasts differentiate within mesenchymal connective tissue
3. spicules of bone radiate out from the ossification centers
4. mesenchymal cells aggregate
A. 4,1,2,3
B. 1,2,4,3
C. 4,2,1,3
D. 4,3,2,1
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