+Ca is the chemical symbol for [Calcium](/wiki/calcium), a soft, silvery-white alkaline earth metal. Essential for life, it forms strong bones and teeth, and plays a critical role in [Muscle Contraction](/wiki/muscle_contraction) and nerve signaling. Found abundantly in dairy, green leaves, and various rock formations, it sculpts both biology and geology.
+## See also
+- [Element](/wiki/element)
+- [Metal](/wiki/metal)
+- [Bone](/wiki/bone)
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