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The Path of Blood Flow Below is a description of blood flow through the structures of the heart. However, the phrases are not in order! Cut out and paste the boxes in the correct order onto another sheet of paper. Connect the boxes with arrows to indicate which way to read the phrases. First one just came from the Lungs (oxygen enters the blood every time we breathe), After delivery, the blood is Oxygen–Poor (and is colored blue in textbooks to indicate this). Oxygen-Rich blood (colored red in books), This blood travels into the Left Atrium, so it can pick up more oxygen and repeat the cycle again. into the Right Ventricle, which forces the blood out through the Aorta (the largest artery in the body). From here the blood is sent to all regions of the body to deliver the oxygen (and nutrients) to the cells. and enters the left side of the heart at the Pulmonary Vein (pulmonary refers to how the blood just came from the lungs). through the Pulmonary Artery towards the Lungs into the Right Atrium, This Oxygen-Poor blood travels back to the right side of the heart through the Vena Cava, and into the Left Ventricle. The Left Ventricle forces the blood out Created by K. Westrich for www.teacherspayteachers.com (© 2007) KEY - Path of Blood Flow Oxygen-Rich blood (colored red in books), just came from the Lungs (oxygen enters the blood every time we breathe), and enters the left side of the heart at the Pulmonary Vein (pulmonary refers to how the blood just came from the lungs). and into the Left Ventricle. The Left Ventricle forces the blood out through the Aorta (the largest artery in the body). This blood travels into the Left Atrium, From here the blood is sent to all regions of the body to deliver the oxygen (and nutrients) to the cells. into the Right Atrium, into the Right Ventricle, which forces the blood out After delivery, the blood is Oxygen–Poor (and is colored blue in textbooks to indicate this). This Oxygen-Poor blood travels back to the right side of the heart through the Vena Cava, through the Pulmonary Artery towards the Lungs Created by K. Westrich for www.teacherspayteachers.com (© 2007) so it can pick up more oxygen and repeat the cycle again.