The Circulatory System The Conduit Through Which Blood Flows

The Circulatory System Consists of:

• The heart - a large hollow muscular organ which pumps blood to the rest of the circulatory system through three types of vessels

• The arteries- which carry oxygenated blood under pressure from the heart to the rest of the body

• The veins - which carry the oxygen depleted blood back to the heart

• The capillaries - which are narrow thin, walled vessels that connect the tiniest arteries with the tiniest veins