<prompt> Blood is flowing through a circuit with an inflow pressure of 100 mmHg and an outflow pressure of 10 mm Hg. Each of the parallel circuits R1, R2, R3, R4, and R5 has a resistance of 5 mm HgmLmin. What is the blood flow across this circuit?3.6 mlmin45 mlmin90 mlmin135 mlmin  <response>: In electrical theory, Ohm;s law states that the resistance, R, equals the ratio of voltage drop, E, to current flow, I.REI Similarly, in fluid mechanics, the hydraulic resistance, R, may be defined as the ratio of pressure drop. Pi - Po, to flow, Q. P and P, are the pressures at the inflow and outflow ends, respectively, of the hydraulic system.R P-PJO For a resistance of vessels in parallel:1R lR1 1R2... 1R5Applying equation 3 to the given blood circuit, the resistance will be 1 mm HgmLmin. From Ohm;s law Equation 2, flow Q in a circuit would be,Q P - PoR By substituting corresponding values for inflow and outflow pressures, the resistance of the given blood circuit in equation 4,Q 100- 101 90 mLminRefer: Ganong;s Review of Medical physiology 23 edition, pg no: 602-604 