Calcium

**Definition:** A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.

**Tree numbers:** - D01.268.552.100 - D01.552.539.288 - D23.119.100

**Synonyms:** - Calcium-40 - Factor IV - Coagulation Factor IV - Blood Coagulation Factor IV