Arteries: Take blood away from the heart and contain the highest blood pressure. Have thick walls to compensate.

Arterioles: Smaller diameter than arteries, carry blood into capillaries.

Capillaries: Where exchange occurs. Form capillary beds to increase surface area for this exchange.

Venules: Retrieve blood from capillaries.

Veins: Return blood to the heart. They have the biggest diameter of the vessels and contain the lowest blood pressure. Can store blood with the help of valves.

Right Atrium: Receives deoxygenated blood from the IVC and SVC and pumps into the right ventricle.

Right Ventricle: Receives blood from right atrium and pumps it into the lungs

Left Atrium: Receives oxygenated blood from the lungs and pumps into the left ventricle.

Left Ventricle: Receives from left atrium and pumps into Aorta (and rest of the systemic circuit).