CV System: The Heart Flashcards Preview

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Flashcards in CV System: The Heart Deck (34):
1

The heart beats ______ times every day

100,000

2

The heart is located in the ________.

Mediastinum

3

What is the pericardium?

Membrane that surrounds the heart

4

The outer layer of the pericardium that is composed of tough, inelastic, dense irregular connective tissue is the _________.

Fibrous pericardium

5

The thinner, more delicate layer of the pericardium is the _________.

Serous pericardium

6

What are the two layers of the serous pericardium?

Parietal layer
Visceral layer

7

_________ lies in between the parietal layer and visceral layer in the __________ cavity.

Pericardial fluid
pericardial

8

What are the layers of the heart wall?

Epicardium
Myocardium
Endocardium

9

What are the chambers of the heart?

Left/right atrium,
Left/right ventricle
Sulci

10

The right atrium receives _________ blood from three veins:_______, ________, and _______

deoxygenated
superior vena cava
inferior vena cava
coronary sinus

11

The right ventricle pumps blood through the _______ into the ________

pulmonary valve
pulmonary arteries

12

The left atrium receives blood from the (organ) ________ through the _________.

lungs
pulmonary veins

13

The right atrium and right ventricle are connected by the _________.

tricuspid valve

14

The left atrium and left ventricle are connected by the _________.

bicuspid valve (mitral valve)

15

Pulmonary veins supply _________ blood to the heart

oxygenated

16

Which ventricle has a thicker wall? Why?

Left ventricle, pumps blood a greater distance than the right at higher pressures

17

What are the semilunar valves?

aortic valve
pulmonary valve

18

Stenosis is a failure of the heart valve to _____

open fully

19

Insufficiency is failure of a valve to _____.

close fully

20

The coronary arteries branch from the _______.

ascending aorta

21

What is the coronary sinus?

a large bascular sinus on the posterior surface of the heart

22

_________ are larger and more numerous in cardiac muscle fiber

Mitochondria

23

_______ allow for propagation of action potentials across branched cardiac muscle fibers

Gap junctions

24

What is the pacemaker of the heart?

Sinoatrial (SA) node

25

What is the atrioventricular (AV) node?

site where action potentials are conducted from the atria to the ventricles

26

Autorhythmic fibers are ________

self-excitable cardiac muscle fibers that maintain the heart's continuous beating

27

Systole is ________

the phase of contraction

28

Diastole is _________

the phase of relaxation

29

Heart Sounds: S1 is described as the _____ sound, and is caused by closure of the _____ valves after ventricular ______ begins.

lubb
atrioventricular (AV)
systole

30

Heart Sounds: S2 is described as the _____ sound, and is caused by closure of the _____ valves after ventricular ______ begins.

dupp
semilunar
diastole

31

CHF can lead to pulmonary edema when the ____ ventricle fails

left

32

CHF can lead to peripheral edema when the _____ ventricle fails

right

33

Define tachycardia

elevated resting heart rate

34

Define bradycardia

resting heart rate under 60 bpm