navya

2. Introduction
 Calcium is a silver white metallic element
of the alkaline earth metal.
 Element - calcium
 Symbol - Ca
 Atomic mass - 40.078
 Atomic number - 20
 Boiling point - 1.4840
C
 Melting point - 838.80C
 Electronic configuration – 1s2 2s2 2p6 3s2
3p6 4s2
 99% of calcium in the human body is in
bone and teeth the remaining 1% in blood.

3.  Calcium is a major components of the structural
materials like bone and shell.
 Formation of skeleton occurs through the
biomineralisation of calcium ion.
 In such structural units calcium forms the
biominerals like insoluble carbonate

4. Seashells Bone
Egg shells Dental caries

5. USES OF CALCIUM
 Muscle contraction –Glycolysis – metabolic
degradation of glucose.
 Gluconeogenesis – metabolic synthesis of
glucose.
 Blood clotting – whenever our skin becomes
broken, calcium works together with vitamin
K and protein will helps to blood clotting.
 Messenger system for hormonal activation
1 Parathyroid hormone
2 Calcitonin

6. Diseases
 Rickets (defective
calcification):
 Osteporosis
(demineralisation of
bone)
 Hypercalcaemia
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