EVERYDAY SCIENCE

Detailed explanation-1: -Atrial systole: lasts about 0.1 seconds-both atria contract and force the blood from the atria into the ventricles. Ventricular systole: lasts about 0.3 seconds-both ventricles contract, blood is forced to the lungs via the pulmonary trunk, and the rest of the body via the aorta.

Detailed explanation-2: -Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase. At a normal heart rate, one cardiac cycle lasts for 0.8 second.

Detailed explanation-3: -systole, period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle (the sequence of events in a single heart beat). Systole causes the ejection of blood into the aorta and pulmonary trunk.

Detailed explanation-4: -Cardiac cycle events can be divided into diastole and systole. Diastole represents ventricular filling, and systole represents ventricular contraction/ejection.

Detailed explanation-5: -There are two basic phases of the cardiac: diastole (relaxation and filling) and systole (contraction and ejection).