题目内容
In healthy adult, a delicate homeostasis is maintained betweeen the action of osteoclasts and osteoblasts.
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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.
Vertebra and certain facial bones are called irregular bones because they have different number in all individuals.
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