human health

BLOOD PRESSURE Certain pressure is always exerted on the walls of the arteries as the blood flows through them during systolic and diastolic phases of cardiac function. The pressure is highest during contraction of the heart and lowest when the heart is relaxing. Hence it is known as systolic and diastolic blood pressure respectively. An average blood pressure for a normal healthy adult is 120 mmHg (systolic) and 80 mmHg (diastolic). Age, sex, time of the day, posture, exercise, emotions, lack of oxygen and changes in the metabolism are some of the factors, which can influence the heart rate as well as the blood pressure. CONTROL OF BLOOD PRESSURE The carotid arteries in the upper neck region are divided into external and internal carotid arteries. At this bifurcation, wall of […]