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Blood transport system There are 3 types of blood vessels: 1. Arteries 2. Veins 3. Capillaries Arteries Carry blood away from the heart They carry blood at high pressure You can feel your pulse in an ARTERY Arteries divide again and again until they finally form tiny blood vessels called.. Capillaries! Capillaries are the smallest blood vessels, with very thin walls Several things pass in and out of them. They are… • Oxygen out of the lungs • Oxygen and glucose into cells • Carbon dioxide and other wastes out of the cells • Carbon dioxide into the lungs Capillaries join together into larger blood vessels Which then become Veins SO! Capillaries join arteries to veins Veins Carry blood back to the heart They carry blood at low pressure They have valves to stop blood flowing backwards Key point notes! The heart and blood vessels make up the circulatory system. The 3 kinds of blood vessels are •Arteries •Capillaries •Veins Blood circulates (goes round the body) like this: Key point notes! Arteries are the thickest and strongest as they have to carry blood at high pressure. Capillaries are the smallest and thinnest. They have thin walls to allow gases, glucose and wastes to diffuse in and out easily. They are in contact with all the cells in the body. Veins have thinner walls than arteries as they carry blood at low pressure. They are the only ones to have valves!