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Blood's Amazing Journey
"Think of your blood as the transportation system in your body that's always on the move, making deliveries and pick-ups day and night. Pumped by your heart, your blood is circulated non-stop, carrying oxygen and nutrients to wherever needed, and collecting waste products called carbon dioxide." — Excerpt from "My Blood, Your
Blood," an educational Blood takes two main paths in its trip through the body. Blood is pumped out to the body in vessels called arteries. Arteries carry oxygenated blood to all parts of the body. Once the blood has delivered oxygen and nutrients and picked up waste products, such as carbon dioxide, it is transported back through the heart through vessels called veins. The heart contracts, sending blood into the lungs to be reoxygenated and to rid itself of carbon dioxide. From the lungs, the blood reenters the heart and the cycle begins again. Arteries take oxygenated blood from the heart out to all areas of the body. The walls of the arteries are too thick for oxygen and nutrients to pass through and enter other body tissues. The circulation of blood can easily be observed moving through arteries, capillaries, and veins.
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