The ventricles pump deoxygenated blood to lungs at about how many mmHg? And into the ascending aorta at a pressure of about how many mmHg?

1 Answer
Nov 24, 2017

Blood pressure in pulmonary artery should not be more than 20mm of Hg, which is much lesser than that in aorta.


Please remember that heart has two ventricles to pump blood out.

  • Right ventricle pumps deoxygenated blood to lungs through pulmonary artery. Blood travels a small distance in this case as lungs lie inside rib cage, on two sides of the heart. Blood pressure in pulmonary artery is generally 9 to 18 mmHg.
  • Left ventricle pumps oxygenated blood to all the body organs, except lungs through aorta . It ascends from ventral side (ascending aorta) before descending along dorsal side (descending aorta).
  • Left ventricle must pump blood under high pressure so that it reaches farthest tissues of the body, and for doing that wall of left ventricle has become more muscular and thicker.
  • Blood pressure in aorta is 120 mmHg during systole and 80 mmHg during diastole.Systole involves contraction and Diastole involves relaxation of heart muscles.