Читать книгу Understanding Anatomy and Physiology in Nursing - John Knight - Страница 93

Contraction of the heart’s chambers is referred to as systole while relaxation is referred to as diastole. For the heart to function as an efficient pump, it needs to contract and relax in a precisely timed sequence. This sequence ensures the upper chambers contract first (atrial systole), allowing the ventricles to fill, which then contract (ventricular systole) to eject blood from the heart.