Heart 3 Flashcards

(58 cards)

1
Q

What are the 3 main parts of the cardiovascular system?

A

heart, blood, and blood vessels

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2
Q

What do arteries do?

A

Take blood away from the heart

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3
Q

In the artery what is the first and outside layer, made up of connective tissue, called?

A

Tunica Externa

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4
Q

In the artery what is the second and middle layer, made up of smooth muscle, called?

A

Tunica Media

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5
Q

In the artery what is the third and inner layer, made up of endothelial cells, called?

A

Tunica Intima

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6
Q

What do veins do?

A

Bring blood to the heart

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7
Q

What is the function of the capillaries?

A

Exchange materials between the blood and the body’s cells

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8
Q

How big are capillaries?

A

Microscopic in size

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9
Q

What is the location of the heart?

A

Cavity between the lungs, 2/3 left of midsagittal

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10
Q

What is the size of the heart?

A

Roughly the size of a fist

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11
Q

Outer membrane of the heart

A

Pericardium

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12
Q

External (outer) layer of the heart

A

Parietal pericardium

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13
Q

Protection (physical barrier), anchors heart to other structures, and provides lubrication to reduce friction.

A

Functions of the pericardium and its 2 layers.

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14
Q

1st layer of the heart (outer portion)

A

Epicardium

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15
Q

2nd layer of the heart (middle layer that consists of twisted cardiac muscle)

A

Myocardium (layer that actually contracts)

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16
Q

3rd layer of the heart (inner layer made of epithelial tissue)

A

Endocardium

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17
Q

What is the Atrium divided by?

A

Interatrial Septum

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18
Q

What is the function of the Atria?

A

Receives blood from veins

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19
Q

What is the function of the Right Atria?

A

Receives blood from superior and inferior vena cava

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20
Q

What is the function of the Left Atria?

A

Receives blood from pulmonary veins

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21
Q

The ____ atria has poor oxygen and high CO2, while the ____ atria is rich in oxygen.

A

Right; Left

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22
Q

What are Ventricles?

A

Muscular pumps

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23
Q

What are the Ventricles divided by?

A

Interventricular Septum

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24
Q

What does the Right Ventricle do?

A

Receives blood from the right atria

25
Where does the Right Ventricle pump blood to the lungs through?
Pulmonary Arteries
26
What does the Left Ventricle do?
Receives blood from the left atria
27
Where does the Left Ventricle pump blood to the body through?
Aorta
28
What is Systemic Circulation?
heart-lungs-heart-body-heart
29
Heart Valves allow for ____ ____ circulation.
"one way"
30
What are the 2 Atrioventricular Valves (AV valves)?
Tricuspid and Mitral Valve
31
What is located between the right atria and right ventricle?
Tricuspid Valve
32
What is located between the left atria and left ventricle (it is the heavier and stronger of the two)?
Bicuspid or Mitral Valve
33
____ ____ and papillary muscles stop valves from being folded backwards.
Chord Tendinae
34
What is located between the pulmonary artery and right ventricle?
Pulmonary Semilunar Valve
35
What is located between the aorta and left ventricle?
Aortic Semilunar Valve
36
What is the pacemaker of the heart?
Sinoatrial node or SA node (begins each heartbeat)
37
What does the atrioventricular node (AV node) do?
Receives the impulse from the SA node
38
What is the events of one complete heartbeat ( about 0.8 seconds) called?
Cardiac Cycle
39
What is the amount of blood pumped out of each side of the heart in 1 minute called?
Cardiac Output
40
What is the expansion and contraction of an artery as the left ventricle contracts?
Pulse
41
What is the pressure blood exerts on the inner walls of blood vessels?
Blood Pressure
42
What is a measure of the systolic pressure (ventricles contracting) OVER the diastolic pressure (ventricles relaxing)?
Measuring BP
43
What amplifies electric current of heart producing distinct wave patterns?
The Electrocardiogram
44
What is the depolarization of atria?
P wave
45
What is the depolarization of ventricles?
QRS Complex
46
What is the repolarization of ventricles?
T wave
47
What are some risk factors of getting heart disorders and diseases?
Cholesterol, hypertension, smoking, obesity, and heredity
48
What is the term that covers many different types of heart problems?
Heart Disease
49
What involves inadequate blood supply to the heart muscle?
Coronary Artery or Heart Disease
50
What causes severe chest pain due to brief lack of oxygen to heart muscle?
Angina
51
What is a decrease in blood supply to the heart?
Ischemia
52
What is the dying of tissue due to lack of blood supply and oxygen?
Infarctions
53
What happens when blood supply to the heart is cut of (ischemia) resulting in heart tissue dying?
Myocardial Infarction (also known as a heart attack)
54
What is known as a problem with the SA node or AV node?
Fibrillation
55
What is it called when atria "quiver" or do not contract normally?
Atrial Fibrillation
56
What is known as a slowing of the heart rate due to SA or AV node problems?
Bradycardia
57
What is known as valves that do not close correctly causing blood to leak back through the valve?
Heart Murmur
58
What is known as valves that become calcified, rough, narrow, and that do not close properly?
Stenosis