Cardiovascular System Flashcards

1
Q

What are the layers of the heart?

A
  • Epicardium
  • Myocardium
  • Endocardium
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2
Q

What is the bulk layer called?

A

The myocardium

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3
Q

What does the lining of the blood vessels consist of?

A

Endocardium

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4
Q

How many pulmonary veins are there? Where do they transport blood?

A
  • 4 veins
  • left atrium
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5
Q

The right atrium receives blood from (blank.)

A
  • superior/inferior vena cava
  • coronary sinus
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6
Q

The left atrium receives blood from (blank.)

A
  • the pulmonary veins
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7
Q

The right ventricle pumps blood into?

A

pulmonary trunk

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8
Q

The left ventricle pumps blood into?

A

aorta

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9
Q

What are papillary muscles responsible for?

A

Keeping the valve flap in a closed position

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10
Q

What do SL valves do? What is the medical term?

A
  • prevent backflow into ventricles in repolarization
  • semilunar valve
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11
Q

What are the two semilunar valves?

A
  • aortic semilunar valve
  • pulmonary semilunar valve
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12
Q

What is the pathway of blood through the heart?

A

Cycle: SVC/IVC —> Right Atrium —> Tricuspid Valve —> Right Ventricle —> Pulmonary Semilunar Valve —> Pulmonary Trunk —> Lungs —> Heart —> Pulmonary veins —> Left Atrium —> Bicuspid Valve —> Left Ventricle —> Aortic Semilunar Valve —> Aorta —> Body

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13
Q

How does the heart tissue receive blood?

A

Coronary circulation

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14
Q

How much bloody supply does the heart require?

A

1/20th of the blood in the body

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15
Q

When is the blood delivered to the heart tissue?

A

When the heart is releaxed.

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16
Q

What are the appearance, length, and additional characteristics of cardiac muscles?

A
  • striated
  • short
  • fat
  • branched
  • interconnected
  • 1 central nuclei
17
Q

What do intercalated discs do?

A

Anchor cardiac cells together

18
Q

What are desmosomes?

A

Keep cells stuck together.

19
Q

What are gap junctions?

A

allow ions to pass from cell to cell

20
Q

What is the heartbeat a function of?

A
  • gap junctions
  • intrinsic cardiac conduction system
21
Q

What is involved in the process of sequence of excitation?

A
  • SA node
  • AV node
  • AV bundle
  • R/L Bundle Branches
  • Purkijnje fibers
22
Q

What is an EKG?

A

composite of all action potential

23
Q

What is the lub dub sound associated with?

A

associated with the closing of heart valves

24
Q

What is systole? What does it indicate?

A
  • contraction
  • closure of AV valve
25
Q

What is diastole? What does it indicate?

A
  • relaxation
  • closure of the SL valve
26
Q

What is the cardiac cycle?

A

blood flow through heart during one complete heartbeat