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Circulatory System Terms to Know
Venule: A small vein, especially one joining capillaries to larger veins Vein: one of the system of branching vessels or tubes conveying blood from various parts of the body to the heart Vena cava: either of two large veins discharging blood into the right atrium of the heart Pacemaker: an electronic device implanted beneath the skin for providing a normal heartbeat by electrical stimulation of the heart muscle
Capillary: one of the minute blood vessels between the terminations of the arteries and the beginnings of the veins
Red blood celss: the disk-shaped cells in the blood that contain hemoglobin
Aorta: the main trunk of the arterial system, conveying blood from the left ventricle of the heart to all of the body except the lungs Artery: a blood vessel that conveys blood from the heart to any part of the body Arteriole: any of the smallest branches of an artery, terminating in capillaries Lymph: a clear yellowish, slightly alkaline, coagulable fluid, containing white blood cells in a liquid resembling blood plasma, that is derived from the tissues of the body and conveyed to the bloodstream by the lymphatic vessels
Ventricle: either of the two upper chambers on each side of the heart that receive blood from the veins and in turn force it into the ventricles Valve: A membranous structure in a hollow organ or passage, as in an artery or vein, that folds or closes to prevent the return flow of the body fluid passing through it Blood transfusion: the injection of blood from one person or animal into the bloodstream of another
Ventricle: either of the two lower chambers on each side of the heart that receive blood from the atria and in turn force it into the arteries Pulmonary circulation: the circulation of blood from the heart to the lungs for oxygenation and back to the heart Systemic circulation: the general circulation of the blood through the body
Rh factor: any of a type of specific antigen present on the surface of red blood cells
the system of organs and tissues, including the heart, blood, blood vessels, lymph, lymphatic vessels, and lymph glands, involved in circulating blood and lymph through the body
White blood cells: colorless cells in the blood that help combat infection
Diastole: the normal rhythmical dilatation of the heart during which the chambers are filling with blood Systole: the rhythmic contraction of the heart, especially of the ventricles, by which blood is driven through the aorta and pulmonary artery after each dilation or diastole Sphygmometer: an instrument, often attached to an inflatable air-bladder cuff and used with a stethoscope, for measuring blood pressure in an artery Deoxygenated blood: blood with very littel oxygen
Coronary Circulation: the circulation of blood in the blood vessels that supply blood to and from the heart muscle
Hemoglobin: the oxygen-carrying pigment of red blood cells that gives them their red color and serves to convey oxygen to the tissues Platelets: a minute, nonnucleated, disklike cytoplasmic body found in the blood plasma of mammals that is derived from a megakaryocyte and functions to promote blood clotting Plasma: the liquid part of blood or lymph
