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anatomy > anatomy of heart C16 > Flashcards

anatomy of heart C16 Flashcards

1
Q

cardiology

A

the study of the heart

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2
Q

precordium

A

anterior chest wall overlying the heart and great vessels

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3
Q

endocardium

A

innermost layer

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4
Q

myocardium

A
  • middle layer of the heart
  • thickest layer
  • composed of cardiac muscle
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5
Q

epicardium

A
  • outermost layer

- helps form the pericardium

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6
Q

pericardium

A

attaches the heart to the surrounding structures

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7
Q

atrium

A

upper chambers of the heart

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8
Q

ventricles

A

lower chambers of the heart

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9
Q

interatrial septum

A

separates the atriums

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10
Q

interventricular septum

A

separates the ventricles

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11
Q

great vessels

A

large vessels attached to the heart

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12
Q

AV valves (atrioventricular)

A

located between the atria and ventricles

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13
Q

semilunar valves

A
  • control the outflow of blood from the ventricles

- exit valves

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14
Q

tricuspid valve

A
  • 3 cusps

- right atrium - tricuspid valve - right ventricle

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15
Q

bicuspid valve (mitral valve)

A
  • 2 cusps

- left atrium - bicuspid valve - left ventricle

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16
Q

pulmonic valve

A
  • right semilunar valve

- right ventricle - pulmonic valve - pulmonary trunk

17
Q

aortic valve

A
  • left semilunar valve

- left ventricle - aortic valve - aorta

18
Q

coronary arteries

A
  • blood supply that supplies the myocardium

- resemble a crown encircling the heart

19
Q

conduction system

A

SA & AV node blood supply

20
Q

SA node

A
  • pacemaker of the heart (sets the rate at which the heart beats)
  • electrical signal that originates here is called the action potential / cardiac impulse
  • located in the upper posterior wall of the right atrium
21
Q

AV node

A
  • acts as a path for the cardiac impulse to travel from the ACF into the ventricular bundle of His
  • slows the cardiac impulse as it moves into the bundle of His
  • located in the floor of the right atrium
22
Q

automaticity

A

the ability of the pacemaker cells to generate their own electrical signal unassisted

23
Q

rhythmicity

A

the regularity of the cardiac impulse

24
Q

electrocardiogram (ECG)

A

the record of the electrical signals of the heart

anatomy (2 decks)

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