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23 Cards in this Set
- Front
- Back
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Vasodilation
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Expansion in the diameter of blood vessels - increases blood flow. Vasodilation near the skin brings more blood to the surface to help reduce body temperature.
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Vasoconstriction
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Decrease in the diameter of blood vessels - decreases blood flow. Vasoconstriction near the skin conserves body heat.
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Cordae Tendinae
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holds the AV valve in place.
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Sinoatrial Node
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Bundle of specialized muscle tissue located in the wall of the right atrium of the mammalian heart. It generates an electrical impulse that stimulates cardiac muscle fibres to contract and relax rhythmically, produces a regular heartbeat. (pacemaker)
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Atrioventricular Node
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Bundle of specialized muscle tissue located in the wall of the right atrium. Receives electrical stimulus from the sinoatrial node and transmits this impulse over the walls of the ventricles to start their contractions.
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Systolic Pressure
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Maximum blood pressure exerted during ventricular contraction.
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Diastolic Pressure
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Lowest blood pressure exerted before the ventricles contract.
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Plasma
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Fluid portion of the blood made up of water, dissolved gases, proteins, sugars, vitamins, minerals, hormones and waste products.
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Erythrocyte
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Blood cell that contains the respiratory protein hemoglobin and is specialized in oxygen transport.
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Leucocyte
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A colorless blood cell that protects the body from infection by the way of the immune response and also plays a role in allergic reactions and inflammation. There are 3 types: granulocytes, monocytes, lymphocytes.
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Platelet
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Component of the the formed portion of the blood. Consisting of fragments of cells that are created when larger cells in the bone marrow break apart. Contains no nucleus and plays a key role in blood clotting.
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Atrium (Left and Right Atria)
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One of the two upper chambers of the heart that collects blood flowing into the heart. The right atrium receives blood from systemic circulation and the left from pulmonary circulation.
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Pulmonary Circulation
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Carries oxygen poor blood from the heart to the lungs, and oxygen rich blood from the lungs to the heart. (right side)
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Systemic Circulation
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Carries oxygen rich blood from the heart to the body tissues, and oxygen poor blood from the tissues back to the heart. (left side)
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Ventricles
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One of the two lower chambers of the heart. Each ventricle receives blood from one of the atria and pumps it into systemic or pulmonary circulation.
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Septum
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In the heart, the muscular wall that separates the two ventricles and the two atria.
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Superior and Inferior Vena Cava
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One of two large vessels - the superior and inferior vena cava - that open into the right atrium of the heart.
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Pulmonary Artery
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Blood vessel that carries blood from the heart to the lungs.
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Pulmonary Vein
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Blood vessel that carries blood from the lungs to the heart.
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Aorta
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Major artery that carries oxygenated blood away from the heart to all regions of the body, except the lungs.
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Tricuspid Valve
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A valve formed of three triangular segments, particularly that between the right atrium and ventricle of the heart.
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Bicuspid Valve
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The valve between the left atrium and the left ventricle of the heart, consisting of two tapered cusps.
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Semilunar Valves
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Each of a pair of valves in the heart, at the bases of the aorta and the pulmonary artery, consisting of three cusps or flaps that prevent the flow of blood back into the heart.
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