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Flashcards in chapter 12 Deck (52):
1

Heart

Fist-sized organ thats pumps blood throughout the body

2

Epicardium

Has two parts; Myocardium, endocardium

3

Endocardium

lines heart and blood vessels

4

Atrium

receives blood; superior to the ventricles

5

Interatrial Septum

separates the heart HORIZONTALLY

6

Interventricular Septum

separates the heart VERTICALLY

7

AV Valve (Tricuspid)

directs blood flow prevents bakflow

8

Chordae Tendinae

fibrous cords prevents cusps inverting

9

Pulmonary SL Valve

prevents blood flowing into right ventricle

10

Biuspid (mitreal) Valve

between two atria has cusps

11

Papillary Muscle

keeps bicuspid valve from inverting in left atrium

12

Aortic SL Valve

thiccer than the pulmonary SL valves

13

Sup and Inf venae cavae

deoxygenated blood enters right atrium, largest veins in the body

14

Stroke Volume

volume of blood pumped by one ventricle per BEAT

15

Cardiac Output

volume of blood pumped by one ventricle per MIN

16

Congestive heart failure

when cardiac output is insufficient

17

Systole

contraction of heart

18

Diastole

relaxation of heart

19

"lub"

sound when ventricles contract, atrioventricular valves close

20

"dub"

when SL valves close, ventricles relax

21

Mitreal Stenosis

steptococcal infection, narrow opening of bicuspid valve

22

SA node

peacemaker, initiates heartbeat

23

AV node

conducts the impulse to a group of large fibers

24

Purkinje Fiber

causes ventricles to contract, begins at apex

25

Electrocardiogram

record of changes during a cardiac cycle

26

Cardiac control center

can alter heart rate, located in medulla ablongata

27

Arteries

transport blood AWAY from heart

28

Arterioles

small arteries

29

Arteriosclerosis

process of hardening arteries

30

Cerebrovascular Accident

A stroke, happens when brain has no oxygen

31

Capillaries

arterioles branch into capillaries

32

Capillary Beds

network of capillaries

33

Precapillary sphincters

encircles the entrance to each capillary

34

Veins

carries blood from capillary beds TO heart

35

Venules

small veins

36

Valves (in veins)

prevent blood going to heart

37

Varicose veins

abnormal dilations in veins in lower legs

38

Hemorrhoids

varicose veins

39

Phlebitis

inflammation in a vein

40

Pulmonary Circulation

circulates blood though lungs

41

systemic circulation

serves the needs of body's tissues

42

Circle of Willis

the branches the oxygenated blood in arteries gives off in the region of the pituitary

43

Coronary Arteries

part of the systemic circulation, serves myocardium

44

Hepatic Portal system

carries blood from stomach, intestines to liver

45

Foramen Ovale

opening between two atria

46

Ductus arteriosus

connection between pulmonary artery and aorta

47

Cyanosis

when blood travels from left to right atrium

48

Pulse

expanding and recoiling of an arterial wall

49

Systolic Pressure

higher number in 120/80, pressure recorded when left ventricle contracts

50

Diastolic pressure

lower number in 120/80, pressure recorded when left ventricle relaxes

51

Hypertension

20% of Americans have high blood pressure

52

Pulmonary Embolism

thromboembolism, obstruction of a blood vessel by a blood clot