Biological importance of magnesium and calcium

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Biological importance of magnesium and calcium:- 

        Calcium and magnesium ions play an important role in biological reaction,. Trees absorb light for photosynthesis from sun in the presence of chlorophyll which contains magnesium .
                   Calcium as it's phophate is an essential element for bones , horns and teeth
of animals ,. Calcium also play an important role in muscle contraction .
                  Energy is stored in biological system in the pyrophosphate linkage . Both calcium and magnesium play a role as catalysts in the formation of linkage is accompanied by release of energy .
         Alkaline earth metals such as magnesium and calcium ions also control meny enzyme reaction the deficiency of magnesium results  in growth failure, spams etc . The deficiency of calcium cause convulsions ,rickets etc .


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