A chemical element that is essential for living organisms, particularly important for bones and teeth.
From Latin 'calx' meaning 'lime, limestone', with the chemical suffix '-ium'. Named by Sir Humphry Davy in 1808 when he isolated the metal from lime.
Calcium is not just in bones - it's crucial for muscle contraction, including your heartbeat! Without calcium ions, your heart couldn't pump and your muscles couldn't move.
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