what causes skeletal system or its parts not function properly
Diseases of the Skeletal System. Osteoporosis. Osteoporosis is a disease of the bones that causes them to be fragile, resulting in fractures. The bones actually become thinner and less dense.This is either due to the body not forming enough new bone, or too much bone being reabsorbed into the body, or both.iseases of the Skeletal System. Osteoporosis. Osteoporosis is a disease of the bones that causes them to be fragile, resulting in fractures. The bones actually become thinner and less dense.