For this assignment, we were tasked with drawing a human heart out of chalk in the hallways. We then walked through the heart, listing out the specific route that blood takes when it travels through the heart and body, as shown by the video below. Deoxygenated blood first enters through the superior and inferior vena cava, coming from the body where the oxygen was last dropped off. These veins lead right into the right atrium, and then pass through the tricuspid valve to get to the right ventricle. The right ventricle then pumps blood back out through the pulmonary valve into the pulmonary artery, where the blood is sent immediately to the lungs to pluck up more oxygen. The newly oxygenated blood then travels from the lung to the pulmonary veins, which opens up to the left atrium. Oxygenated blood is pumped through the bicuspid valve to the left ventricle, where it is then pumped out through aortic valve and aorta to reach parts of the body where oxygen is necessary. The cycle then repeats itself over and over again, picking up and dropping oxygen throughout the body.
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