Heart (cardiovascular system)

Question 1

Pericardium?

Answer 1

-where the Heart sits
-reduces friction and provides protection
-fluid filled sac lined by parietal pericardium

Question 2

3 Heart walls?

Answer 2

1)Epicardium:outermost layer(visceral pericardium
2)Myocardium:cardiac muscle fibers+connective tissue
3)Endocardium:inner lining of the heart

Question 3

4 Heart chambers?

Answer 3

1)right atrium
2)left atrium
3)Right ventricle
4)Left ventricle

Question 4

Right chambers?

Answer 4

-collect deoxygenated blood from body&pumps it into the lungs
-Pulmonary circuit

Question 5

Left chambers?

Answer 5

-collect oxygenated blood from lungs & pumps it from lungs to body
-Systemic circuit

Question 6

Pulmonary circuit?

Answer 6

-between heart –> lungs
-uses the lungs to create oxygenated blood
-col

Question 7

Systemic circuit

Answer 7

-between heart –>rest of body
-uses heart to circulate blood between body tissues and the lungs

Question 8

Superior vena cava(from head)

Answer 8

• deoxygenated blood

Question 9

Inferior vena cava (from body)

Answer 9

-deoxygenated blood

Question 10

Right pulmonary vein

Answer 10

-oxygenated blood

Question 11

left pulmonary vein

Answer 11

-oxygenated blood

Question 12

blood movement in heart?

Answer 12

-controlled by four valves
-2 atrioventricular valves
-2 semilunar valves
-valves are opened by chordae tendineae

Question 13

“lubb” sound in the heart

Answer 13

AV valves closing

Question 14

‘Dubb” sound in the heart

Answer 14

semilunar valves closing

Question 15

Right and left coronary arteries?

Answer 15

-nourish the myocardium
-blood is collected in coronary veins
-leads to coronary sinus

Question 16

what carries blood way from heart?

Answer 16

Arteries=away

Question 17

what carries blood to the heart?

Answer 17

Veins

Question 18

cardiac cycle driven by?

Answer 18

Intrinsic activity

Question 19

Pacemaker cells?

Answer 19

-located in the sinoatrial node(SA node),right atrium
-electrical stimulation begins at SA node
-then spread to atrioventricular node(AV node) receives the signal
-then passes it Perkinje fibers innervating the ventricular muscle cells

Question 20

Systole?

Answer 20

contracting of a chamber, pumping

Question 21

Diastole?

Answer 21

-Relaxation of a chamber, refilling
-blood enter atria, from the systemic&pulmonary circuits

Question 22

Right atrium goes to ?

Answer 22

right ventricle

Question 23

Left atrium goes to?

Answer 23

left ventricle