blood mineral amount blood calcium amount CMO:0000065 The proportion, quantity, or volume in whole blood, serum, or plasma of this metallic bivalent element with atomic symbol Ca and atomic number 20. VT:0001562 CMO:0003227 CMO:0000378 blood calcium level CMO:0000502 CMO:0000503 MP:0001562 Trait.ontology calcium amount blood electrolyte amount