EVERYDAY SCIENCE

Detailed explanation-1: -Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure.

Detailed explanation-2: -Blood pressure is measured both as the heart contracts, which is called systole, and as it relaxes, which is called diastole. Systolic blood pressure is measured when the heart ventricles contract. Diastolic blood pressure is measured when the heart ventricles relax.

Detailed explanation-3: -Definition. Cardiac contractility can be defined as the tension developed and velocity of shortening (i.e., the “strength” of contraction) of myocardial fibers at a given preload and afterload.

Detailed explanation-4: -Force output declined gradually with time. During the train of contractions, subjects voluntarily contracted the knee extensors for 1 min; this raised systemic blood pressure by 29%.

Detailed explanation-5: -Systole is when the heart muscle contracts. When the heart contracts, it pushes the blood out of the heart and into the large blood vessels of the circulatory system. From here, the blood goes to all of the organs and tissues of the body. During systole, a person’s blood pressure increases.