Process:  - Air travels into the body - Air reaches the lungs - The lungs absorb the oxygen from the air - The oxygen is transported by hemoglobin - Red blood cells are made of hemoglobin - Blood has a lot of red blood cells - The heart moves the blood throughout the body - Blood can bring the oxygen to different cells in the body.  Perturbation hypothesis: suppose the heart has not been damaged happens, how will it affect the heart moves less blood.  Does the supposed perturbation have an effect (direct or indirect) on the process?
Answer:
yes