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Medical Terminology > Chapter 6 A (Cardiovascular System) > Flashcards

Chapter 6 A (Cardiovascular System) Flashcards

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USMLE® Step 1 flashcards
1
Q

Atrioventricular (AV) Node

A

Specialized part of the interatrial septum that sends a charge to the bundle of His

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2
Q

Atrioventricular bundle

A

Bundle of fibers in the interventricular septum that transfers charges in the heart’s conduction system; also called bundle of His

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3
Q

Conduction system

A

Part of the heart containing specialized tissue that sends electrical charges through heart fibers, causing the heart to contract and relax at regular intervals

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4
Q

Coronary artery

A

Blood vessel that supplies oxygen-rich blood to the heart

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5
Q

Depolarization

A

Contracting state of the myocardial tissue in the hear’s conduction system

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6
Q

Diastole

A

Relaxation phase of the heartbeat

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7
Q

Ductus arteriosus

A

Structure in the fetal circulatory system through which blood flows to bypass the fetus’s non-functioning lungs

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8
Q

ductus venosus

A

structure in the fetal circulatory system through which blood flows to bypass the fetal liver

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9
Q

Endocardium

A

Membranous lining of the chambers and valves of the heart; the innermost layer of heart tissue

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10
Q

Endothelium

A

Lining of the arteries that secretes substances into the blood

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11
Q

Epicardium

A

Outermost layer of heart tissue

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12
Q

Foramen ovale

A

Opening in the septum of the fetal heart that closes at birth

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13
Q

Mitral valve (bicuspid valve)

A

Atrioventricular valve on the left side of the heart

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14
Q

Myocardium

A

Muscular layer of heart tissue between the epicardium and the endocardium

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15
Q

Pacemaker

A

Term for the sinoatrial (SA) node; also an artificial device that regulates heart rhythm

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16
Q

Pericardium

A

Protective covering of the heart

17
Q

Polarization

A

Resting state of the myocardial tissue in the conduction system of the heart

18
Q

Repolarization

A

Recharging state; transition from contraction to resting that occurs in the conduction system of the heart

19
Q

Semilunar valve

A

One of the two valves that prevent the backflow of blood flowing out of the heart into the aorta and the pulmonary artery

20
Q

Sinoatrial node (SA node)

A

Region of the right atrium containing specialized tissue that sends electrical impulses to the heart muscle, causing it to contract

21
Q

Systole

A

contraction phase of the heartbeat

22
Q

Tricuspid valve

A

Atrioventricular valve on the right side of the heart

23
Q

Venule

A

A tiny vein connecting to a capillary

Medical Terminology (50 decks)

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