Term
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Definition
| muscle that makes up the heart walls |
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Term
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Definition
| part of the cardiac cycle where the heart muscle of the atria contract |
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Term
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Definition
| heart valve between the atria and ventricles |
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Term
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Definition
| part of the cardiac cycle where the heart muscle of the ventricles contract |
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Term
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Definition
| valves leading into the main arteries leaving the heart |
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Term
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Definition
| volume of blood expelled from one ventricle of the heart per minute |
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Term
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Definition
| volume of blood expelled from left ventricle during one cardiac cycle |
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Term
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Definition
| contraction and relaxation of cardiac muscle in a heart neat |
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Term
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Definition
| part of the cardiac cycle where cardiac muscle is relaxed |
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Term
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Definition
| region of nervous tissue in the wall of the right atrium; receives impulses from the medulla |
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Term
| atrio-ventricular node (AVN) |
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Definition
| nervous tissue found at the junction between the atria and ventricles |
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Term
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Definition
| record of electrical activity in the heart, used to detect heart abnormalities |
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Term
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Definition
| part of the brain with centres controlling heart rate (& breathing & peristalsis) |
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Term
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Definition
| opposing actions of the sympathetic and parasympathetic nervous systems |
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Term
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Definition
| controls involuntary action of smooth & cardiac muscle and glands |
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Term
| sympathetic accelerator nerves |
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Definition
| nerve fibres which result in increase in heart rate; part of the autonomic nervous system |
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Term
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Definition
| hormone and neurotransmitter released by sympathetic nerve fibres |
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Term
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Definition
| nerve fibres which result in decrease in heart rate; part of the autonomic nervous system |
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Term
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Definition
| neurotransmitter released by parasympathetic nerve fibres |
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Term
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Definition
| instrument used to measure blood pressure |
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Term
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Definition
| abnormally high blood pressure in arteries |
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Term
| coronary heart disease (CHD) |
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Definition
| condition caused by blockage of the coronary arteries |
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Term
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Definition
| life-threatening condition when the blood supply to part of the brain is cut off |
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