. The liquid portion of your blood is called . 2. Erythrocytes, also called , are packed with hemoglobin and transport oxygen to body tissues. 3. Leukocytes, also called , function in fighting infections. 4. Several types of white blood cells are , which engulf bacteria and cellular debris. 5. are cell fragments involved in the process of blood clotting. 6. , also called antibodies, are plasma proteins that function in body defense. 7. are dissolved ions that function in maintaining proper pH and osmotic balance in the blood.