structure of the heart

Question 1

how many chambers is the heart comprised of

Answer 1

4

Question 2

closed circulatory system

Answer 2

blood is pumped around the body and is contained within a network of blood vessels

Question 3

open circulatory system

Answer 3

blood is insde a body cavity and bathes the organs

Question 4

double circulatory system

Answer 4

one loop to the lungs and one to body

Question 5

single circulatory system

Answer 5

onle that that includes both the lungs and the body

Question 6

right side of the heart

Answer 6

pumps deoxygenated blood to the lungs for gas exchange
- pulmonary circulatory system

Question 7

left side of the heart

Answer 7

oxygeneated vlood can be pumped around the body
- systematic circulatory system

Question 8

where is the heart protected

Answer 8

in the chest cavity by the pericardium

Question 9

pericardium

Answer 9

a tough and fibrous sac

Question 10

what is the left and right side of the heart separated by

Answer 10

septum

Question 11

valves

Answer 11

keep blood flowing foward in the right direction maintain the correct pressure

Question 12

what is the right atrium and ventricle separated by

Answer 12

atrioventricular valve (tricuspid)

Question 13

what is the left ventricle and atrium separated by

Answer 13

bicuspid valve

Question 14

what is the right ventricle and pulmonary artery separated by

Answer 14

semilunar valve (pulmonary valve)

Question 15

what is the left ventricle and aorta separated by

Answer 15

aortic valve

Question 16

valves in the heart

Answer 16

• open when the pressure of blood behind them is greate than the pressure in front of them

Question 17

how are valves attached to the heart walls by

Answer 17

valve tendons which prevent them from flipping inside out under high pressure

Question 18

adaptation of left ventricle

Answer 18

• thicker muscle for strong contractoin to pump blood all the way around the body

Question 19

ventricle

Answer 19

thicker walls that the atria to pump blood out of the hearrt

Question 20

AV valves

Answer 20

prevent backflow of blood from ventricles into atria

Question 21

SL valves

Answer 21

prevent backflow of blood from the aorta into the ventricles

Question 22

what are the 2 blood vessels that bring blood into the heart

Answer 22

vena cava- from body
pulmonary vein- from lung

Question 23

blood vessles that take blood away from heart

Answer 23

pulmonary artery- to the lungs
aorta- to the body

Question 24

systole

Answer 24

contraction of the heart

Question 25

diastole

Answer 25

relaxation of the heart

Question 26

what happens to the volume of a heart chamber when its muscle contracts

Answer 26

volum decreases and chamber contracts

Question 27

what happens to the volume of a heart chamber when its muscle relaxes

Answer 27

volume increases as the chamber relaxes

Question 28

relationship between volume and pressure

Answer 28

volume decreases, pressure increases

Question 29

what causes heart valves to open and close

Answer 29

pressure changes in different regions of the heart

Question 30

what happens to the atrial walls during atrial systole

Answer 30

the walls of the atria contact

Question 31

how does atrial systole affect atrial volume

Answer 31

atrial volume decreases

Question 32

how does atrial systole affect atrial pressure

Answer 32

atrial pressure increases

Question 33

how does atrial systole affect the ventricles

Answer 33

ventricle pressure and volume slightly increase as they receive blood

Question 34

what phase are the ventricles in during atrial systole

Answer 34

ventricular diastole

Question 35

what happens to the ventricular walls during ventricular systole

Answer 35

the walls of the ventricles contract

Question 36

how does ventricular systole affect ventricular volume

Answer 36

ventricular volume decreases

Question 37

how does ventricular systole affect ventricular pressure

Answer 37

ventricular pressure increases

Question 38

what hapens to the atria during ventricular systole

Answer 38

atrial diastole and begin to fill with blood

Question 39

what happens to the heart chambers during diastole

Answer 39

both ventricles and atria are relaxed