blood cell quantity platelet quantity EFO:0008446 EFO:0007985 platelet count EFO:0009187 The proportion or number of the disc-like fragments of megakaryocytes that are found in the blood and function in clotting. Trait.ontology VT:0003179 EFO:0004309 platelet number CMO:0001349 CMO:0000029 platelet morphology trait