Intro to Cardiovascular System

Question 1

Cardiovascular system

Answer 1

A closed system of the heart and blood vessels

Question 2

the heart pumps

Answer 2

blood

Question 3

blood vessels allow blood to…

Answer 3

circulate to all parts of the body

Question 4

function

Answer 4

to deliver oxygen and nutrients and to remove carbon dioxide and other waste products

Question 5

location of heart/characteristics

Answer 5

-thorax between the lungs (mediastinum)

-pointed apex directed toward left hip

-about the size of your fist

-less than 1 lb

Question 6

Pericardium

Answer 6

a double serous membrane

Question 7

Visercal pericardium

Answer 7

next to heart

Question 8

Parietal pericardium

Answer 8

outside layer

Question 9

Serous fluid

Answer 9

fills the space between the layers of pericardium

Question 10

how many layers is the heart wall

Answer 10

3: epi, myo, endo

Question 11

Epicardium

Answer 11

-outside layer

-parietal pericardium

-connective tissue layer

Question 12

Myocardium

Answer 12

-middle layer

-mostly cardiac muscle

Question 13

Endocardium

Answer 13

-inner layer

-endothelium

Question 14

how many chambers

Answer 14

4: atria, ventricles

right and left side act as separate pumps

Question 15

Atria

Answer 15

-receiving chambers (right and left)

Question 16

Ventricles

Answer 16

-discharging chambers (right and left )

Question 17

Valves

Answer 17

-4

-allow blood to flow in only one direction

Question 18

Atrioventricular valves

Answer 18

between atria and ventricles

-bicuspid (left), tricuspid (right)

Question 19

Semilunar

Answer 19

valves between ventricle and artery

-pulmonary, aortic

Question 20

valves

Answer 20

-valves open as blood is pumped through

-held in place by chordae tendineae (heart strings)

-close to prevent backflow

Question 21

Valves pathology

Answer 21

-incompetent valve= backflow and repump

-stenosis= stiff= heart workload increased

Question 22

Lup

Answer 22

bicuspid and mitral valve or AV valves close

Question 23

Dub

Answer 23

aortic and pulmonary or semilunar valves close

Question 24

aorta

Answer 24

leaves left ventricle

Question 25

pulmonary arteries

Answer 25

leave right ventricles

Question 26

vena cava

Answer 26

enters right atrium

Question 27

pulmonary veins

Answer 27

-4; enter left atrium

Question 28

blood in the heart chambers does not…

Answer 28

nourish the myocardium

Question 29

the heart has its own nourishing circulatory system

Answer 29

-coronary arteries

-cardiac veins

Question 30

blood empties into the right atrium via the

Answer 30

coronary sinus