Exam #2 Flashcards

1
Q

What does the cardiovascular system consist of?

A

the blood, heart, and blood vessels

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2
Q

What anatomical structure in the heart “pulls the valves” ?

A

chordae tendinae

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3
Q

What anatomical structure separates the ventricles in the heart?

A

interventricular septum

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4
Q

What anatomical structure in the heart “lines” the ventricles?

A

trabeculae carneas

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5
Q

What type of blood is pumped through the left ventricle?

A

oxygenated

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6
Q

What valve is located inside the left ventricle?

A

bicuspid (mitral)

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7
Q

What valve is located inside the right ventricle?

A

tricuspid

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8
Q

What part of the heart is mostly seen when opening up the heart such as during heart surgery?

A

right ventricle

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9
Q

What part of the heart is hidden posteriorly when opening up the heart?

A

left ventricle

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10
Q

Where is the heart located?

A

mediastinum

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11
Q

What is the area called from the “sternum to the vertebral column” ?

A

mediastinum

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12
Q

How much mass of the heart sits on the left of the midline?

A

2/3

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13
Q

What are the 3 layers of the heart wall?

A
  1. Pericardium 2. Myocardium 3. Endocardium
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14
Q

What layer is the pericardium?

A

most outer layer

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15
Q

What layer is the myocardium?

A

outer layer (middle)

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16
Q

What layer is the endocardium?

A

inner most layer

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17
Q

What is the function/purpose of the pericardium?

A

anchors and protects

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18
Q

What is the purpose of the myocardium?

A

cardiac muscle layer

bulk of the heart

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19
Q

What is the purpose of the endocardium?

A

chamber lining

valves

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20
Q

How many chambers make up the heart?

A

four

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21
Q

What are the chambers of the heart?

A

2 upper atria

2 lower ventricles

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22
Q

What is sulci?

A

grooves on surface of heart

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23
Q

What does sulci contain?

A

blood vessels, fat

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24
Q

What does the sulci function to do?

A

marks boundaries

25
Q

How many sulcis does the heart contain?

A

3

26
Q

What are the 3 sulcis of the heart?

A
  1. coronary sulcus 2. anterior interventricular sulcus 3. posterior interventricular sulcus
27
Q

Where is the coronary sulcus located?

A

between the atria and ventricles

28
Q

Where is the anterior interventricular sulcus located?

A

between the ventricles anteriorly

29
Q

Where is the posterior interventricular sulcus located?

A

between the ventricles posteriorly

30
Q

What varies in the heart according to the function of the chamber?

A

thickness of myocardium

31
Q

What is thin-walled, and deliver blood to adjacent ventricles?

A

atria

32
Q

How much blood from the atria is delivered from actual contraction?

A

1/3

33
Q

How much blood from the atria is delivered from pressure differential?

A

2/3

34
Q

What anatomical structures are much thicker and stronger than the atria?

A

ventricle walls

35
Q

What anatomical structure supplies blood to the lungs?

A

right ventricle

36
Q

What anatomical structure is the absolute thickest in order to supply systemic circulation?

A

left ventricle

37
Q

This structure deals with little flow resistance to do its job?

A

right ventricle

38
Q

Valves open and close in response to what?

A

pressure changes

39
Q

Pressure changes in the heart occur from what?

A

the heart contracting and relaxing

40
Q

When do the AV valves open?

A

when atrial pressure is higher than ventricular pressure

41
Q

What causes atrial pressure to be higher than ventricular pressure?

A

ventricles are relaxed
chordae tendineae are slack
papillary muscles are relaxed

42
Q

The AV valves being opened allows for what?

A

blood to flow from atria into ventricles

43
Q

What side of the heart communicates with the lungs?

A

right side

44
Q

What does the “P” represent on an ECG?

A

atrial depolarization

45
Q

When do the AV valves close?

A

ventricular pressure is higher than atrial pressure

46
Q

What causes ventricular pressure to be higher than atrial pressure?

A

ventricles contract

47
Q

What causes the AV valves to close?

A

pushing valve cusps close
chordae tendinae are pulled tight
papillary muscles contract to pull cords and prevent cusps from everting (pushing outward)

48
Q

AV valves closing prevent what from occurring?

A

backflow of blood into atria

49
Q

What does “lub” refer to?

A

indicates closing of the AV valves

50
Q

What does “dub” refer to?

A

indicates the closing of the pulmonary and aortic valves

51
Q

What are the two closed circuits in regards to blood circulation?

A

the systemic and pulmonic

52
Q

What side of the heart is systemic circulation?

A

left side

53
Q

What does the systemic circulation do?

A

pumps blood through the body

54
Q

What does the left ventricle pump?

A

oxygenated blood into aorta

55
Q

With systemic circulation, the aorta branches into what?

A

many arteries

56
Q

With systemic circulation, the arteries branch into what?

A

many arterioles in tissue

57
Q

With systemic circulation, the arterioles branch into what?

A

thin-walled capillaries

58
Q

The arterioles branch into thin-walled capillaries for what?

A

the exchange of gases and nutrients

59
Q

During systemic circulation, what begins its’ return in venules?

A

deoxygenated blood