Matching Pairs Blood Basics Online version Review by Chantica Valverde 1 Thrombocytes 2 Leukocytes 3 Erythrocytes 4 Hemoglobin 5 PLASMA 6 Hematocrit is iron-based compound that binds with oxygen and transport it to the cells. is the percentage of the blood occupied by red blood cells, or erythrocytes Platelets, which are important in blood clotting White Blood cells, play a key role in the immune system and inflammatory response is the liquid part of the blood red blood cells, contain hemoglobin and transport oxygen to the cell