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11 Cards in this Set
- Front
- Back
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vasodilation
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Expansion in the diameter of blood vessels; 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; vasoconstriction near the skin conserves body heat
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chordae tendinae
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The chordae tendineae, or heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.
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sinoatrial node
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bundle of specializied muscle tissue located in the wall of the right atrium of the mammalian heart; generates an electrical impulse that stimulates cardiac muscle fibres to contract and relax rhythmically, producing a regular heartbeat; also known as 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 contraction
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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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the 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 plus 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 for oxygen transport
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leaucocyte/white blood cell
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colourless blood cell that protects the body from infection by way of the immune response, inflammation; three types include granulocytes, monocytes, and lymphocytes
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platelet
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component of 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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