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