Explain the functioning of the human circulation system.
2.1: Describe the functions of the heart, lungs, kidneys, and liver in the circulation system.
2.2: Describe the ABO and Rh typing systems for human blood.
2.3: Consider the role of the blood in the immune system and the effect of the human immunodeficiency virus on the T4 cells of the blood.
2.5: Discuss respiration by relating the activity to the physical structure like the lungs and blood and the cells fed by the blood.