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Flashcards in Chapter 9 Deck (142)
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1

aorta

largest artery, receives blood from left ventricle and branches all over the body

2

artery

vessel that carries blood away from heart, all arteries except the pulmonary and umbilical carry oxygenated blood.

3

arteriole

small vessel that carries blood from arteries to capillaries

4

atrioventricular (AV) node

small mass in right atrium that passes impulses from the SA node toward ventricles

5

atrioventricular (AV) valve

valve between the atrium and ventricle on both sides of heart.
right = tricuspid valve
left = mitral valve

6

atrium

entrance chamber to heart

7

AV bundle

band of fibers that transmit impulses

8

blood pressure

force exerted by blood against the wall of a vessel

9

bundle branches

Branches of the AV bundle that divide into left and right sides of the interventricular septum

10

capillary

A microscopic blood vessel through which materials are exchanged through blood and the tissues

11

cardiovascular system

Heart & blood vessels

12

depolarization

a change in electrical charge from resting state in nerves/muscles

13

diastole

Relaxation phase of heartbeat

14

electrocardiography

ECG. Study of electrical current of heart as detected by electrodes on the surface of the body.

15

endocardium

Thin membrane that lines chambers of heart and covers the valves

16

epicardium

thin, outermost layer of the heart wall

17

functional murmur

normal sound produced by heart

18

heart

muscular organ with 4 chambers that contracts rhythmically to propel blood around the body via blood vessels.

19

heart rate

beats (contractions) per minute = bpm

20

heart sounds

Sounds produced as heart functions. Loudest are the alternate closing of the valves; S1 and S2

21

inferior vena cava

large inferior vein that brings low 02 blood from lower half of body to the right atrium of the heart

22

left AV valve

Valve between left atrium and left ventricle.
(mitral or bicuspid valve)

23

mitral valve

Valve between left atrium and left ventricle.
(left AV valve or bicuspid valve)

24

myocardium

Thick middle layer of heart wall composed of cardiac muscle

25

pericardium

fibrous sac surrounding heart

26

pulmonary artery

vessel that carries blood from right side to lungs

27

pulmonary circuit

system of vessels that carry blood from the right side of the heart to the lungs to be oxygenated and then back to the left side of the heart

28

pulmonary veins

vessels that carry blood from the lungs to the left side of the heart

29

pulmonary valve

valve at entrance to pulmonary artery

30

pulse

wave of increased pressure in vessels each time the ventricles contract