Chapter 11: Vocabulary Flashcards Preview

Medical Terminology > Chapter 11: Vocabulary > Flashcards

Flashcards in Chapter 11: Vocabulary Deck (40):
1

aorta

largest artery in the body

2

apex of the heart

lower tip of the heart

3

arteriole

small artery

4

artery

largest type of blood vessel; carries blood away from the heart to all parts of the body

5

atrioventricular bundle (bundle of His)

specialized muscle fiber connecting the atria with the ventricles and transmitting electrical impulses between them. His is pronounced "hiss"

6

atrioventricular node (AV node)

specialized tissue in the wall between the atria. electrical impulses pass from the pacemaker (SA node) through the AV node and the atrioventricular bundle or bundle of His toward the ventricles.

7

atrium
(plural: atria)

one of the two upper chambers of the heart

8

capillary

smallest blood vessel. materials pass to and from the bloodstream through the thin capillary walls

9

carbon dioxide (CO2)

gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation

10

coronary arteries

blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle

11

deoxygenated blood

blood that is oxygen-poor

12

diastole

relaxation phase of the heartbeat (Greek diastole, dilation)

13

electrocardiogram

record of the electricity flowing through the heart. electricity is represented by waves or deflections called P, QRS, or T

14

endocardium

inner lining of the heart

15

endothelium

innermost lining of blood vessels

16

mitral valve

value between the left atrium and the left ventricle; bicuspid valve

17

murmur

abnormal swishing sound caused by improper closure of the heart valves

18

myocardium

muscular, middle layer of the heart

19

normal sinus rhythm

heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60 to 100 beats per minute

20

oxygen

gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells

21

pacemaker (sinoatrial node, SA node)

specialized nervous tissue in the right atrium that begins the heartbeat. an artificial cardiac pacemaker is an electronic apparatus implanted in the chest to stimulate heart muscle that is weak and not functioning.

22

pericardium

double-layered membrane surrounding the heart

23

pulmonary artery

artery carrying oxygen-poor blood from the heart to the lungs

24

pulmonary circulation

flow of blood from the heart to the lungs and back to the heart valve positioned between the right ventricle and the pulmonary artery

25

pulmonary valve

valve positioned between the right ventricle and the pulmonary artery

26

pulmonary vein

one of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart

27

pulse

beat of the heart as felt through the walls of the arteries

28

septum
(plural: septa)

partition or wall dividing a cavity; such as between the right and left atria (interatrial septum) and right and left ventricles (interventricular septum)

29

visceral pericardium

internal membrane of the pericardium

30

parietal pericardium

outer membrane of the pericardium

31

sinoatrial node (SA node)

pacemaker of the heart

32

sphygmomanometer

instrument to measure blood pressure

33

systemic circulation

flow of blood from body tissue to the heart and then from the heart back to body tissues

34

systole

contraction phase of the heartbeat. (Greek systole, contraction)

35

tricuspid valve

located between the right atrium and the right ventricle; it has three leaflets, or cusps

36

valve

structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction

37

vein

thin-walled vessel that carries blood from body tissues and lungs back to the heart. veins contain valves to prevent backflow of blood

38

vena cava
(plural: venae cavae)

largest vein in the body. the superior and inferior venae cavae return blood to the right atrium of the heart

39

ventricle

one of two lower chambers of the heart

40

venule

small vein

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