As blood travels through the blood vessel, it exerts a force on the walls of the vessel. The force per unit area is the blood pressure and it is measured by using a device called a sphygmomanometer, which reads the pressure during systole (contraction of the ventricle) and diastole (relaxation of the ventricle) at the aorta. Blood pressure varies within the different types of blood vessels. Blood pressure is highest within the large arteries (such as the aorta) because they are connected directly to the ventricle of the heart. As the blood vessel splits from the small arteries and into the arterioles, there is a drop in blood pressure. This drop occurs because there is an increased ratio of surface area to volume, which means that the blood is in contact with more blood vessel surface area. This slows down the velocity of the blood within arterioles and thus drops the pressure. This happens because arterioles connect directly to capillaries, which are very thin blood vessels that cannot withstand a high pressure. As the blood travels though the capillaries slowly, exchange of nutrients and waste products takes places. The blood then empties into the venules, small veins and eventually into the
Explanation:Dahil po ang heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body.
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Answer:
As blood travels through the blood vessel, it exerts a force on the walls of the vessel. The force per unit area is the blood pressure and it is measured by using a device called a sphygmomanometer, which reads the pressure during systole (contraction of the ventricle) and diastole (relaxation of the ventricle) at the aorta. Blood pressure varies within the different types of blood vessels. Blood pressure is highest within the large arteries (such as the aorta) because they are connected directly to the ventricle of the heart. As the blood vessel splits from the small arteries and into the arterioles, there is a drop in blood pressure. This drop occurs because there is an increased ratio of surface area to volume, which means that the blood is in contact with more blood vessel surface area. This slows down the velocity of the blood within arterioles and thus drops the pressure. This happens because arterioles connect directly to capillaries, which are very thin blood vessels that cannot withstand a high pressure. As the blood travels though the capillaries slowly, exchange of nutrients and waste products takes places. The blood then empties into the venules, small veins and eventually into the
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Answer:
The heart
Explanation:Dahil po ang heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body.