Autoregulation is the ability of an organ’s blood vessels to maintain a relatively constant blood flow despite changes in the driving blood pressure. When blood pressure rises or falls within a certain range, the vessels in the organ automatically constrict or dilate to compensate, keeping perfusion stable. The brain has particularly powerful autoregulatory capacity. Cerebral … Read more
A group of cells in the heart located between the upper two chambers (the atria) and the lower two chambers (the ventricles) that regulates the electrical current that passes through it to the ventricles
Atrioventricular valves are the two valves that control blood flow from the atria (the heart’s upper chambers) into the ventricles (the lower chambers), preventing backflow. The mitral valve lies between the left atrium and left ventricle, and the tricuspid valve lies between the right atrium and right ventricle. Together with the arterial (semilunar) valves at … Read more