1. Cardiovascular System

5. 4. Blood flow through the heart and body right atrium right ventricle pulmonary artery lungs pulmonary veins left atrium left ventricle aorta smaller arteries capillaries small veins larger veins right atrium

7. 6. Comparing arteries, veins, & capillaries Away from Thick No High Distributes blood, carries O 2 and nutrients Towards Thin Yes Low Returns blood, carries CO 2 and other wastes Both Very thin No Low Exchanges O 2 and nutrients with cells, picks up CO 2 and wastes Function Pressure Valves Thickness of Walls Direction of Flow Capillary Vein Artery Type of Blood Vessel