题目内容
Sufficient quantities of calcium and phsphorus must be included in the diet for bone growth and replacement.
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In healthy adult, a delicate homeostasis is maintained betweeen the action of osteoclasts and osteoblasts.
Bone muaturation and remodeling go on perpetually during the life of the individuals.
Osteoporosis in some elderly individuals is due to the decreased ability in the rate of protein formation.
Both sutural and sesamoid bones are variable in nunber from person to person.
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