The blood flow around your body

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  • Created by: Katie
  • Created on: 01-12-13 10:50
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  • The flow of Blood around your body
    • The blood enters the right atrium via the superior vena cava from the upper body and the inferior vena cava from the lower body. It is dark red because it does not contain much oxygen. It has waste products such as carbon dioxide. It is referred to as deoxygenated.
      • The right atrium pumps the blood into the right ventricle through the tricuspid valve. As this valve shuts, the first sound of the heartbeat is heard.
        • The deoxygenated blood is pumped along the pulmonary artery leading to the lungs.
          • In the lungs the blood releases its carbon dioxide and is supplied with fresh oxygen. It is now bright red in colour.
            • The oxygenated blood returns from the lungs to the left atrium via the pulmonary vein.
              • The left atrium pumps blood through the bicuspid valve into he left ventricle.
                • The left ventricle muscle contracts and the blood is pushed out via the semi-lunar valve, which close to stop the blood flowing backwards. The closing makes the second sound of the heart beat.
                  • The oxygenated blood is pumped out from the left ventricle through the semi lunar valves and into the aorta.
                    • The aorta is the largest artery where the oxygenated blood begins its journey around the body to distribute the oxygen and remove any waste products.

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