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