cardiovascular system; heart

Question 1

mammalian heart chambers

Answer 1

left atrium
right atrium
left ventricle
right ventricle

Question 2

reason for double pump

Answer 2

two atria contract simultaneously
-> two ventricles contract simultaneously afterwards

Question 3

double pump

Answer 3

forces blood through the cardiac cycle

Question 4

pathway of blood through heart
1

Answer 4

as blood returns from the body it’s collected in vein: superior vena cava
superior vena cave flows into right atrium

Question 5

pathway of blood through heart
2

Answer 5

atria contracts right atrium -> right venticle

Question 6

pathway of blood through heart
3

Answer 6

ventricles contract right ventricle, then pumps blood from
heart -> lungs

Question 7

pathway of blood through heart
4

Answer 7

oxygenated blood returns to heart from lungs via pulmonary vein -> empties into left atrium

Question 8

pathway of blood through heart
5

Answer 8

atria contract left atrium pumps blood into left ventricle

Question 9

pathway of blood through heart
6

Answer 9

when ventricles contract left ventricle = pumps blood through
aorta -> systematic circulation

Question 10

pathway of blood through heart
7

Answer 10

ventricles = thicker muscular walls
push blood out through blood vessels -> pulmonary + systematic
circulation

Question 11

atria

Answer 11

atria only pumps blood -> ventricles

have thin walls + do not generate much force

Question 12

ventricles

Answer 12

thickest wall
must force blood the greatest distance

Question 13

vena cava fact

Answer 13

they are one

Question 14

blood fact

Answer 14

always on both sides of your heart

Question 15

heart positioning

Answer 15

in the center of body, leans left

Question 16

valves of the heart

Answer 16

series of valves prevent blood from flowing the wrong way through the cardiac cycle

Question 17

valve separating atria + ventricles

Answer 17

atrioventricular valve

Question 18

valve separating atria + ventricles right side

Answer 18

tricuspid valve

Question 19

valve separating atria + ventricles left side

Answer 19

bicuspid valve

Question 20

valve separating left/right ventricle + aorta

Answer 20

semilunar valve

Question 21

‘lub-dub’ sound reasoning

Answer 21

caused by opening + closing of valves

Question 22

softer lub

Answer 22

sound of atrioventricular valves closing

Question 23

sharper dub

Answer 23

sound of semilunar valves snapping shut, following contraction of ventricles