The pressure in the aorta is normally about 100 mm Hg, whereas that in the monar

Question

The pressure in the aorta is normally about 100 mm Hg, whereas that in the monary artery is normally about 15 mm Hg. A few of, your fellow students off, % following alterative hypotheses about why this might be so: a. The right heart pumps less blood than the left heart. b. The right heart rate is slower than the left heart rate. c. The right ventricle is less muscular than the left ventricle. d. The pulmonary vascular bed has less resistance than the systemic bed e. The stroke volume of the right heart is less than that of the left heart f. It must be genetics. Which of their suggestions is (are) correct?

Explanation / Answer

C.)

The right ventricle is less muscular than left ventricle. Generally the pressure is high in left ventricle because it has to do systemic circulation whereas right ventricle performs pulmonary circulation.The right ventricle receives deoxygenated blood from the right atrium via the tricuspid valve and pumps it into the pulmonary artery via pulmonary valve  into the pulmonary circulation.

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