write a short note on auricular diastole
Answers
Answer:
When the ventricles have completed most of their filling, the atria begin to contract (atrial systole), forcing blood under pressure into the ventricles. Ejection causes pressure within the ventricles to fall, and, simultaneously, the atria begin to refill (atrial diastole).
Answer:
All four chambers of the heart, two atria, and two ventricles, are concurrently approaching relaxation and dilation, or diastole, at the start of the cardiac cycle. Separate blood volumes return to the right atrium (from the vena cavae) and the left atrium, filling the atria (from the lungs). The mitral and tricuspid valves open once chamber and back pressures equalise, and returning blood flows via the atria into the ventricles. The atria begin to contract (atrial systole) when the ventricles are nearly full, propelling blood under pressure into the ventricles. The ventricles begin to contract, and the mitral and tricuspid valves close as the pressures within the ventricles rise.