(singular is atrium) the two chambers located at the top of the heart; responsible for receiving blood, storing it up and passing it on to the ventricles the artery supplying blood to the head and brain the primary artery supplying blood to the body refers to the entire blood flow system blood vessels that carry blood away from the heart; all arteries carry oxygenated blood except the pulmonary artery and umbilical arteries in the fetus, both of which carry deoxygenated blood a network of tiny blood vessels throughout the body that provide oxygen and nutrients to the body's cells means heart, or pertaining to the heart tiny air sacs in the lungs where gas exchange takes place; in this process, oxygen (o2) is taken from the air that was inhaled and transferred to the blood and carbon dioxide (co2) is taken from the blood and transferred to the air, which is then 1. alveoli 2. aorta 3. arteries 4. atria 5. capillaries 6. cardio 7. cardiovascular 8. carotid artery