What happens during systole?

During systole, the ventricles contract, which is a crucial phase of the cardiac cycle. This contraction pumps blood out of the heart; specifically, the right ventricle sends deoxygenated blood to the lungs through the pulmonary artery, while the left ventricle pumps oxygenated blood into the aorta for distribution to the rest of the body.

The contraction of the ventricles is facilitated by electrical impulses from the heart's conduction system, which coordinate the heart's actions to ensure efficient blood circulation. This phase is essential for maintaining adequate blood pressure and ensuring that the organs receive sufficient oxygen and nutrients.

Understanding the mechanics of systole is fundamental in recognizing and managing various cardiovascular conditions, as it reflects how effectively the heart can deliver blood under different circumstances.