The Heart

Annotations:

• The heart has 4 chambers the right and left atria and right and left ventricles. the atria pump blood into the ventricles. The arteries from the right side is the pulmonary artery which goes to the lungs then into the left atria then left ventricle followed by the aorta rest of the body into the vena cava lastly into the right atria and then right ventricle.

1. Flow diagram
   1. From the rest of the body by vena cava
      1. right atria
         1. right ventricle
            1. pulmonary artery
               1. lungs
                  1. pulmonary vein
                     1. left atria
                        1. left ventricle
                           1. aorta
                              1. rest of the body
   2. The heart has 4 chambers the right and left atria and right and left ventricles. the atria pump blood into the ventricles. The arteries from the right side is the pulmonary artery which goes to the lungs then into the left atria then left ventricle followed by the aorta rest of the body into the vena cava lastly into the right atria and then right ventricle.
2. how it works
   1. The left side of the heart has to pump blood much further so its wall is much thicker.