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DMSU 200 Midterm > Key Terms: Heart and Thorax > Flashcards

Key Terms: Heart and Thorax Flashcards

1
Q

Thinner portion of the right interatrial septum

A

Fossa ovalis

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2
Q

Superior margin of the manubrium sterni; lies opposite the lower border of the body of the second thoracic vertebrae

A

Suprasternal notch

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3
Q

Lower boundary of the thorax, formed by the cartilages of the seventh through tenth ribs and the ends of the eleventh and twelfth cartilages

A

Costal margin

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4
Q

Vertical line from the midpoint of the clavicle

A

Midclavicular line

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5
Q

Lowest point of the sternum

A

Xiphoid

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6
Q

Enter the right atrium from above and returns unoxygenated blood

A

Superior vena cava

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7
Q

Separates the right ventricle from the left ventricle

A

Interventricular septum

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8
Q

Located in the lower portion of the right interatrial septum which directs the electrical pulse toward the ventricles

A

atrioventricular node

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9
Q

Angle between the manubrium and the body of the sternum; also known as the angle of louis

A

Sternal angle

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10
Q

Two upper chambers of the heart

A

Atria

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11
Q

Two lower chambers of the heart

A

Ventricles

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12
Q

Junction between the xiphoid and the sternum

A

Xiphisternal joint

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13
Q

Muscular contraction of the heart

A

Systole

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14
Q

Small bands that spread the electrical impulse across the ventricles

A

Purkinje fibers

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15
Q

Portion of the vena cava located in the abdomen

A

Inferior vena cava

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16
Q

Method of recording the electrical activity generated by the heart muscle

A

Electrocardiography

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17
Q

Describes the electrical activity that triggers contraction of the heart muscle

A

Depolarization

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18
Q

Ring of dense tissues that attach the mitral and tricuspid valves

A

Annulus fibrosus

19
Q

Lies in the median plane over the sternum

A

midsternal line

20
Q

Valves located between the atria and ventricle

A

Atrioventricular valves

21
Q

Describes electrical activity just before the relaxation phase of cardiac muscle activity

A

Repolarization

22
Q

Remnant from fetal development on the edge of the IVC

A

Eustachian valve

23
Q

Sac surrounding the heart, reflecting off the great arteries

A

Pericardium

24
Q

Short ligament that connects the main pulmonary artery and the aorta

A

Ligamentum ateriosum

25
Q

Bands of muscle lining the anterior chamber of the right ventricle

A

Trabeculae carneae

26
Q

Muscular relaxation of the heart

A

Diastole

27
Q

Projections of muscle from the ventricular walls

A

Papillary muscles

28
Q

Runs vertically from a point midway between the anterior and posterior axillary folds

A

Midaxillary line

29
Q

Valves located in the aorta or pulmonic artery

A

Semilunar valves

30
Q

Outer layer of the heart wall

A

Epicardium

31
Q

Multiple thin fibers extending from the free edges of the mitral and tricuspid valves

A

Chordae tendinae

32
Q

Has three leaflets and is located between the left ventricle and aortic root

A

Aortic valve

33
Q

Valve with 3 cusps located between the right ventricle and main pulmonary artery

A

Pulmonic valve

34
Q

Valve located between the right atrium and right ventricle

A

Tricuspid valve

35
Q

Considered the initial pacemaker of the heart

A

Sinoatrial node

36
Q

Inner bands of muscle lining the right ventricle

A

Moderator band

37
Q

Inner layer of the heart wall

A

Endocardium

38
Q

Muscle that tightly lines the appendage

A

Pectinate muscle

39
Q

Thick, contractile middle layer of the heart

A

Myocardium

40
Q

Remnant form fetal development causing prominent edges on the coronary sinus

A

Thesbian valve

41
Q

Located between the IVC, and the opening of the right ventricle

A

Coronary sinus

42
Q

Small triangular extension from the upper portion of both atria

A

Appendage

43
Q

Bifurcates into right and left branches and helps carry electrical pulse to ventricles

A

Bundle of HIS

DMSU 200 Midterm (8 decks)

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