Lesson 4.2 The Heart at Work - Key Terms

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Flashcards on Lesson 4.2 The Heart at Work - Key Terms, created by Cheyanne Stokes on 17/04/2015.
Cheyanne Stokes
Flashcards by Cheyanne Stokes, updated more than 1 year ago
Cheyanne Stokes
Created by Cheyanne Stokes almost 9 years ago
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Question Answer
Atrioventricular Node A specialized mass of conducting cells located at the atrioventricular junction in the heart.
Blood Pressure Pressure 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.
Cardiology The study of the heart and its action and diseases.
Diastole The stage of the heart cycle in which the heart muscle is relaxed, allowing the chambers to fill with blood.
Diastolic Pressure Blood pressure that remains between heart contractions.
Electrocardiogram (EKG) A measurement of heart electrical activity.
Heart Rate A measure of cardiac activity usually expressed as the number of beats per minute.
Hypertension An abnormally high blood pressure.
Pacemaker An electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart.
Pulse The rhythmic expansion and recoil of arteries resulting from heart contraction; can be felt from the outside of the body.
Sinoatrial Node A 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.
Sphygmomanometer An instrument for measuring blood pressure and especially arterial blood pressure.
Systole The stage of the heart cycle in which the heart muscle contracts and the chambers pump blood.
Systolic Pressure The pressure generated by the left ventricle during systole.
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