AP BIOLOGY

Detailed explanation-1: -Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls. This is called diastolic pressure.

Detailed explanation-2: -Each time the heart beats (contracts and relaxes), pressure is created inside the arteries. The pressure is greatest when blood is pumped out of the heart into the arteries.

Detailed explanation-3: -The higher pressure occurs during the contraction of the heart’s left ventricle. The higher pressure is known as the systolic blood pressure. The lower pressure occurs during the relaxation of the heart’s left ventricle.

Detailed explanation-4: -Systolic blood pressure is measured when the heart ventricles contract. Diastolic blood pressure is measured when the heart ventricles relax. A systolic pressure of 115 millimeters of mercury is considered normal, as is a diastolic pressure of 70. Commonly, this pressure would be stated as 115 over 70.

Detailed explanation-5: -The systolic blood pressure is defined as the maximum pressure experienced in the aorta when the heart contracts and ejects blood into the aorta from the left ventricle (approximately 120 mmHg).