Ultraviolet rays in sunlight ( ergosterol in skin -> Vitamin D)
Rickets Knock knee deformity (genu valgum) Bowleg deformity (genu varum) Wrist enlargement Ankle enlargement - Poor teeth and bone formation - Childrens’ bones are soft; pliable; bent under body weight
Excess Vit. D
Demineralisation of bones -> multiple fractures -> widespread calcification of soft tissues
99% of calcium entering the body is deposited in bones and teeth
Remaining 1% of calcium is dissolved in the blood
When a disorder affects the balance between calcium and other minerals or hormones, calcium can be deposited in other parts of the body, such as arteries, kidneys, lungs, and brain.
Calcium deposits in these parts of the body can cause problems with the function of these organs.
Essential component of protoplasm (very impt.)
Medium in which various chemical rxns take place
Transporting agent for
- digested food substances (intestines -> other parts of body)