A & P Lecture-Heart Flashcards


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created 11 years ago by Feliciaskuel
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1

what do you call the pump of the cardiovascular system

the heart

2

what does the heart do

facilitates the bloods transporting of materials through the body

3

Cardiac muscle tissue is found in which layer of the heart

myocardium

4

what valve is found between the right atrium and the right ventricle

tricuspid

5

which blood vessels leave the heart and transport blood to the lungs

pulmonary arteries

6

what structures prevent prolapse of the atrioventricular valves?

chordae tendineae

7

can pectinate muscles be identified in the ventricles?

NO, you can however identify trabeculae carneae,papillary muscles, and chordae tendineae

8

what vessels carry blood to the heart

Veins

9

what do arteries do

carry blood away from the heart

10

blood being pumped out of the left ventricle enters the...

aorta

11

Blood is prevented from flowing back into the left ventricle by?

aortic semilunar valve

12

Deoxygenated blood from the myocardium enters the right atrium through what?

coronary sinus

13

without SA node input what would the heart rate be?

50 beats per minute

14

The atrioventricular bundle is located where?

Interventricular septum

15

Atrial repolarization occurs during this period of time,seen on an ECG

QRS complex

16

The entire ventricular myocardium remains depolarized during this time on an ECG

S-T segment

17

Nerve impulses are directly supplied to the papillary muscles by what?

Subendocardial conducting network

18

The lub-dup heart sounds heard during auscultation of the heart are associated with

the heart valves closing

19

when are all four heart valves closed?

isovolumetric contraction

20

During what phase does stroke volume decrease in the ventricles

ventricular ejection

21

during which part of the cardiac cycle would pressure in the ventricle be at its lowest

mid-diastole

22

the greatest decrease in ventricular pressure occurs at this time

isovolumetric relaxation

23

the amount of blood pumped out of each ventricle in one minute is called

cardiac output

24

where is the heart enclosed?

mediastinum

25

which direction does the heart tip slightly?

to the left

26

How many layers does the pericardium have?

2 layers, a fibrous and a serous layer