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Lesson 4.2 The Heart at Work - Key Terms
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- 1Atrioventricular NodeA specialized mass of conducting cells located at the atrioventricular junction in the heart.
- 2Blood PressurePressure exerted by the blood upon the walls of the blood vessels, especially arteries, usually measured by means of a sphygmomanometer and expressed in millimeters of mercury.
- 3CardiologyThe study of the heart and its action and diseases.
- 4DiastoleThe stage of the heart cycle in which the heart muscle is relaxed, allowing the chambers to fill with blood.
- 5Diastolic PressureBlood pressure that remains between heart contractions.
- 6Electrocardiogram (EKG)A measurement of heart electrical activity.
- 7Heart RateA measure of cardiac activity usually expressed as the number of beats per minute.
- 8HypertensionAn abnormally high blood pressure.
- 9PacemakerAn electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart.
- 10PulseThe rhythmic expansion and recoil of arteries resulting from heart contraction; can be felt from the outside of the body.
- 11Sinoatrial NodeA small mass of tissue that is made up of Purkinje fibers, ganglion cells, and nerve fibers, that is embedded in the musculature of the right atrium, and that originates the impulses stimulating the heartbeat -- called also S-A node, sinus node.
- 12SphygmomanometerAn instrument for measuring blood pressure and especially arterial blood pressure.
- 13SystoleThe stage of the heart cycle in which the heart muscle contracts and the chambers pump blood.
- 14Systolic PressureThe pressure generated by the left ventricle during systole.
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- Fichas sobre Lesson 4.2 The Heart at Work - Key Terms, creado por Cheyanne Stokes el 17/04/2015.
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- Cheyanne Stokes
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