Development of bone

 The development of bone requires a well-balanced diet containing all all essential food factor calcium and phosphorus are particularly necessary. An adult requires 1 gram of calcium a day in pregnancy more is needed as the Mother's blood serum must supply the calcium required for bone and both formation in the developing fateus. Calcium is obtained from milk cheese cabbage carrot and other vegetable and phosphorus from milk egg yolk and green vegetables. Food containing vitamin D which promote the observation of calcium are essential for bone calcification. Deficiency of vitamin D in the diet of children give rise to rickets because there is insufficient absorption of calcium resulting in interface with bone calcification and the bone soften. In adult deficiency gives rise to osteomalacia.