BiSci #2 (Exam 2) Flashcards Preview

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Flashcards in BiSci #2 (Exam 2) Deck (67):
1

2 components of the cardio system

1. heart
2. blood vessels

2

pulm circuit

flow of blood thru the lungs

3

systemic circuit

flow of blood thru the rest of the body

4

arteries

always carry blood away from the heart and usually carry O2 rich blood

5

aorta

largest artery

6

arterioles

smallest arteries

7

veins

always returns blood to the heart and usually carry O2 poor blood

8

vena cava

largest veins in the body

9

venules

smallest veins

10

capillaries

smallest blood vessels connecting arterioles to venules

11

arteriole end

exit of O2, water, and nutrients

12

venus end

entrance of CO2, water, and wastes

13

heart

composed of 4 chambers and lies almost in the center of the thoracic cavity

14

septum

separates right and left sides of the heart

15

systole

when ventricles contract and pump blood out of the heart

16

diastole

when ventricles relax and receive blood from atria

17

120/80

normal blood pressure

18

cardiac cycle

one complete heart beat were both atria contract simultaneously followed by ventricles contracting simultaneously

19

SA node (pacemaker)

initiates the heartbeat and causes the atria to contract

20

AV node

causes the ventricles to contract

21

extrinsic control of heartbeat

the autonomic nervous system and hormones can modify the rate of the heartbeat

22

electrocardiogram (ECG)

a recording of the electrical changes that occur in the myocardium during a cardiac cycle

23

ventricular fibrillation

chaotic quivering of the irritated ventricles that drastically reduces cardiac output

24

pulse

alternating expansion and recoil of an arterial wall

25

blood flow

pumping action of the heart moves blood thru the arteries

26

blood flow in veins

1. skeletal muscle contraction
2. one way valves
3. respiratory movements

27

slow

blood flow in capillaries is

28

pulm circuit

powered by the right ventricle

29

pulm arteries

carry O2 poor blood in the lungs

30

pulm veins

carry O2 rich blood from the lungs to the left atrium

31

systematic circuit

powered by the left ventricle

32

aorta

carry O2 rich blood to all body tissues

33

vena cavas

return O2 poor blood to the right atrium

34

coronary circuit

supplies blood to the heart muscle itself
-first branches off the aorta
-arteries can become clogged and by pass surgery may be necessary

35

renal circuit

supplies blood to the kidneys

36

hepatic portal circuit

supplies blood to the digestive organs especially the liver

37

hypertension

high blood pressure

38

atherosclerosis

plaque build up in arteries (reduces blood flow)

39

thromboembolism

a clot that has been carried in the bloodstream but is not stationary

40

stroke (CVA)

cranial arteriole bursts or is blocked, a portion of the brain dies, and may result in paralysis or death

41

heart attack (MI)

occurs when a part of the heart muscle dies due to lack of O2

42

aneurysm

weak spot in a blood vessel where it balloons out and may rupture

43

angina pectoris

chest pain or radiating pain in the left arm

44

varicose veins

develop when the valves of the veins become weak and ineffective

45

phlebitis

inflammation of a vein and blood clots may form

46

t-PA (tissue plasminogen activator)

used to dissolve blood clots

47

heart failure

the heart no longer pumps as it should due to heart attack damage and oversized heart

48

lymphatic system

a one way system taking excess tissue fluid to the subclavian veins

49

lymphatic system functions

1. takes up excess fluid and returns it to the bloodstream
2. lacteals absorbs fat molecules and transports them to the bloodstream
3. helps defend the body against disease

50

lymph nodes

cleanse lymph of debris and pathogens and store lymphocytes to fight infection

51

spleen

cleanse the blood in much the same way as lymph nodes cleanse lymph

52

red bone marrow

produces both B and T cells

53

thymus gland

where T cells mature

54

tonsils

function to recognize infectious agents entering the body

55

smooth muscles

walls of capillary are

56

veins

majority of the blood is in

57

arteries

away

58

veins

toward

59

bottom of the heart

right venatical (deox blood)

60

right after RV

comp pulm triank

61

to aorta

left venatical (oxy blood)

62

blood

into 1st chamber RA

63

false

all blood carry oxy poor blood
-true? false?

64

yes

pulm arteries has deoxy blood?

65

no

pulm vein has deoxy blood?

66

yes

venicara has deoxy blood?

67

no

aorta has deoxy blood?