Chapter 1 Flashcards

(67 cards)

1
Q

A muscular double pump consists of…

A
  1. Pulmonary Circuit

2. Systemic Circuit

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2
Q

Pulmonary Circuit

A

Takes blood to and from the lungs. On the right side

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3
Q

Systemic Circuit

A

Vessels transport blood to and from body tissues. On the left side. Has greater resistance

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4
Q

3 Functions of the heart…

A
  1. Generate blood pressure
  2. Generates blood supply
  3. Oxygen and nutrient delivery
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5
Q

The position of the heart is…

A
  1. Anterior to the thoracic vertebrae
  2. Poster 2/3 to the sternum
  3. Laterally borders the lungs
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6
Q

The position of the apex is…

A

To the left of the midline

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7
Q

The superior chambers are…

A

The right and left atria

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8
Q

The inferior chambers are…

A

The right and left ventricles

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9
Q

The left ventricle is…

A

3x thicker than the right ventricle

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10
Q

Coronary sulcus’ are…

A

grooves

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11
Q

The left/right auricles are…

A

small muscular appendages of each atrium

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12
Q

The 4 valves are…

A
2 atrioventricular (A-V) valves
2 semilunar valves
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13
Q

The 2 atrioventricular (A-V) valves consists of…

A
  1. Right A-V or tricuspid valve

2. Left A-V or bicuspid valve

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14
Q

The 2 semilunar valves consists of…

A
  1. Left semilunar or pulmonic valves

2. Right semilunar or aortic valve

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15
Q

The pericardium is…

A

the two primary layers (double walled sac)

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16
Q

The pericardium consists of two layers:

A
  1. Fibrous layer pericardium

2. Serous layer pericardium

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17
Q

Fibrous layer pericardium is…

A

strong, outer most layer of connective tissue

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18
Q

The serous pericardium forms two layers:

A
  1. Parietal pericardium

2. Visceral pericardium

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19
Q

Parietal pericardium is…

A

outer lines of the fibrous pericardium

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20
Q

Visceral pericardium is…

A

inner lines, covers the heart tissue

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21
Q

Epicardium

A

Visceral (thin, smooth) layer of the serous pericardium

- Outermost

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22
Q

Myocardium

A

consists of cardiac muscle.

Middle, largest layer

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23
Q

Endocardium

A

Endothelium on connective tissue
Innermost layer
Prevents leakage into other layers

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24
Q

Cardiac muscle tissue forms…

A

a thick layer called myocardium

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25
Cardiac muscle cells are...
cardiomyocytes
26
Cells join at...
Intercalated discs
27
Intercalated discs:
complex junctions; forms cellular networks, cells are joined laterally end to end
28
Gap junctions:
Responsible for electrical impulses of cells
29
Desmosomes
Keeps cells together during contraction
30
Right Atrium:
Forms right border of the heart, receives blood from systemic circuit
31
Fossa Ovalis
Depression in interatrial septum. Remnant of foramen ovale
32
Tricuspid Valve:
3 cusp valves; prevents back flow to the right atrium during systole
33
Right ventricle:
receives blood from the right atrium through the tricuspid valve, pumps into the pulmonary circuit, and contains internal walls
34
3 internal walls of the right ventricle:
1. trabeculae carnae 2. papillary muscle 3. chordae tendineae
35
Trabeculae carnae:
Makes sure valves are working the correct way
36
Papillary muscle
Anchors chordae tendineae
37
Chordae tendinae
Chords connect to tri/bicuspid to keep valves shut
38
Pulmonic valve:
prevents back flow into ventricle during systole
39
The right chamber include:
Right atrium, tricuspid valve, right ventricle, pulmonic valve
40
The left chambers includes:
Left atrium, mitral valve, left ventricle, aortic valce
41
Left atrium:
Hearts posterior Receives oxygen rich blood Opens into the left ventricle via the mitral valve
42
Mitral valve:
Left A-V valve | prevents back flow into the left atrium during systole
43
Left ventricle
Forms apex | pumps blood thru systemic circuit via the aortic semilunar valve (aortic valve)
44
Pulmonary veins are...
always anterior to pulmonary arteries
45
Pulmonary veins are...
inferior and doubles
46
Pulmonary arteries are...
singular, above
47
The heart receives no nourishment....
from blood contained in chamber
48
Right coronary artery
supplies right atrium and both ventricles | has 2 major branches
49
2 major branches of the right coronary artery:
1. Marginal Artery | 2. Posterior Descending Artery (PDA)
50
Posterior Descending Artery (PDA)
supples the bottom portion of both ventricles and the posterior septum
51
Left coronary artery:
Has two major branches
52
2 major branches of the left coronary artery
1. Left circumflex Artery | 2. Left anterior descending artery
53
Left Circumflex Artery (LC)
supplies the left atrium and lateral/posterior ventricle
54
Left Anterior Descending Artery (LAD)
supplies anterior and inferior left ventricle and anterior septum
55
Autonomic Nervous System produces:
Acetyl CoA | Epinephrine
56
Acetyl CoA and Epinephrine control...
excitability, contractility, conductivity
57
Contractile cells
Mechanical work
58
Auto-rhythmic cells
Initial/conduct action potentials
59
Sinoatrial (SA) Node
75 BPM | Sets pace heartbeat
60
Atrioventricular (AV) Node
50 BPM | Delays transmission of action potentials
61
Purkinje Fibers
30 BPM | Can act as a pacemaker
62
Polarized state
No electrical activity | Negative ionic concentration in cell, positive outside
63
Repolarization
Return to resting state
64
Depolarization
Contraction state
65
Muscle impulses spread rapidly between...
cardiac muscle cells by intercalated discs
66
P=
cardiac depolarization
67
QRS=
ventricular depolarization