Other Disorders of the Skeletal System
B ecause bone consists of living cells, it is constantly changing as old cells die and new cells take their places. Any systemic disease during the growing period may temporarily halt the growth of long bones. As the aging process continues, dead bone cells are not replaced as consistently as in earlier life. The bony skeleton thus loses some of its calcium content, a process known as decalcification or bone atrophy , and the bones become fragile.