Clot: a thick mass of coagulated blood

Hemoglobin: a protein of red blood cells containing iron and responsible for transporting oxygen throughout the body and returning CO2 from body tissue back to the lungs

Prothrombin Time: a protein present in blood plasma that is converted into active thrombin during the normal clotting of blood

Thromboplastin: an enzyme

Hematocrit: the ratio of red blood cells to the total volume of blood, typically measured through centrifugation