Organization of The Cardiovascular System In order to function as a pump,the heart must have both receiving and delivery chambers,valves to direct the flow of blood through the heart,a wall that is strongly compressible and thus provides the force to propel blood,and vessels to deliver blood to and from the heart.The heart consists of four chambers:right and left atria and right and left ventricles,of which two are receiving and two are distributing chambers.The right and left atria receive the blood from the great veins and expel it into the right and left ventricles.From the ventricles the blood is pumped into the arterial system and carried to the various organs of the body
Organization of The Cardiovascular System In order to function as a pump, the heart must have both receiving and delivery chambers, valves to direct the flow of blood through the heart, a wall that is strongly compressible and thus provides the force to propel blood, and vessels to deliver blood to and from the heart. The heart consists of four chambers: right and left atria and right and left ventricles, of which two are receiving and two are distributing chambers. The right and left atria receive the blood from the great veins and expel it into the right and left ventricles. From the ventricles the blood is pumped into the arterial system and carried to the various organs of the body
Organization of The Cardiovascular System The arteries carry blood away from the heart.They transport blood to the various body tissues under high pressure exerted by the pumping action of the heart.It is,therefore,imperative that they possess strong,elastic walls to insure fast,efficient blood flow to the tissues.Compared to the other types of blood vessels, arteries must be able to withstand the greatest internal pressrue. After the blood has passed through the capillaries,it is collected into a series of minute vessels,called venules,which join with one another to form veins.The major veins return blood to the atria of the heart.The veins unite with one another,and ultimately two large venous trunks,named the superior and inferior venae cavae, are formed,which convey the blood to the heart
Organization of The Cardiovascular System The arteries carry blood away from the heart. They transport blood to the various body tissues under high pressure exerted by the pumping action of the heart. It is, therefore, imperative that they possess strong, elastic walls to insure fast, efficient blood flow to the tissues. Compared to the other types of blood vessels, arteries must be able to withstand the greatest internal pressrue. After the blood has passed through the capillaries, it is collected into a series of minute vessels, called venules, which join with one another to form veins. The major veins return blood to the atria of the heart. The veins unite with one another, and ultimately two large venous trunks, named the superior and inferior venae cavae, are formed, which convey the blood to the heart
Organization of The Cardiovascular System The superior and inferior venae cavae bring to the right atrium the blood which has become deoxygenated and taken up carbon dioxide during its circulation through the tissues of the body.From the right atrium this venous blood passes into the right ventricle,by which it is expelled into the pulmonary trunk to be conveyed to the lungs.As it circulates through the pulmonary capillaries the blood is brought into close relationship with the inspired air and it gives off some of its carbon dioxide and acquires a fresh supply of oxygen.This oxygenated blood is returned by the pulmonary veins to the left atrium and thence passes into left ventricle.With each beat of the heart the left ventricle pumps its contents into the aorta,which distributes blood through its numerous branches to all the tissues and organs of the body
Organization of The Cardiovascular System The superior and inferior venae cavae bring to the right atrium the blood which has become deoxygenated and taken up carbon dioxide during its circulation through the tissues of the body. From the right atrium this venous blood passes into the right ventricle, by which it is expelled into the pulmonary trunk to be conveyed to the lungs. As it circulates through the pulmonary capillaries the blood is brought into close relationship with the inspired air and it gives off some of its carbon dioxide and acquires a fresh supply of oxygen. This oxygenated blood is returned by the pulmonary veins to the left atrium and thence passes into left ventricle. With each beat of the heart the left ventricle pumps its contents into the aorta, which distributes blood through its numerous branches to all the tissues and organs of the body
Systemic Circulation and Pulmonary Circulation Systemic Circulation:Left ventricle- aorta-Systemic blood capillary-vena cava-right atrium. Pulmonary Circulation: Right ventricle-pulmonary artery-Pulmonary blood capillary-pulmonary vein-left atrium
Systemic Circulation and Pulmonary Circulation Systemic Circulation: Left ventricleaorta-Systemic blood capillary-vena cava-right atrium. Pulmonary Circulation: Right ventricle-pulmonary artery-Pulmonary blood capillary-pulmonary vein-left atrium
Pumping Function of Heart 0 0.4 0.8 Atrium Ventricle Cardiac Cycle Yellow represents systole and green represents diastole
Pumping Function of Heart Atrium Ventricle 0 0.4 0.8 Cardiac Cycle Yellow represents systole and green represents diastole