2. 1. The Heart 2. Blood Vessels 3. Blood

3. 1. The Atria - Receiving Chambers 2. The Ventricles - Pumping Chambers 3. The Valves - Controls Flow of Blood 4. The Septum - Divides the Heart

6. 1. Arteries - Carry blood away from the Heart - The Aorta is the largest artery 2. Veins - Carry blood toward the heart - Contain valves - The Vena Cava is the largest vein

7. 3. Capillaries - Known as the “Distribution Pipes”

8.  The Plasma (Fluid) makes up 55% of the blood volume  The Solids (Red & White Blood Cells) make up 45% of the blood volume

9. 1. Red Blood Cells - Carry oxygen - Contain Hemoglobin 2. White Blood Cells - Attack bacteria & other foreign invaders 3. Platelets - Control the blood clotting process