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Unformatted text preview: 5. I increased the right flow tube radius in increments of 0.5mm and repeated step 3 until a radius of 6.0mm was reached recording the results each time Results: (See attached pages) Discussion: As the right flow tube radius was increased the fluid flow rate also increased. The pump rate also increased because the resistance to fluid flow was decreased. These results suggest that the heart must contract less forcefully if the resistance to the blood flow in the right flow tube (aorta) is increased. By contrast, constricting the blood vessels entering the heart (pulmonary veins) would increase the time needed to fill the heart chambers. Decreasing the left flow tube radius would also decrease the flow rate and pump rate and vice versa....
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- Fall '07