The Heart

Question 1

What type of blood does the right side pump to lungs?

Answer 1

Deoxygenated blood

Question 2

What does the left side of the heart pump what type of blood to the whole body?

Answer 2

Oxygenated blood

Question 3

What does the pulmonary artery do?

Answer 3

Carry deoxygenated blood to lung

Question 4

What does the vena cava do?

Answer 4

Return deoxygenated blood to the heart from body

Question 5

What does the aorta do?

Answer 5

Biggest artery

Carry oxygenated blood to the body

Question 6

What does the pulmonary vein do?

Answer 6

Carry oxygenated blood from the lungs

Question 7

What is this?

Answer 7

Aorta

Question 8

What is this?

Answer 8

Pulmonary Vein

Question 9

What is this?

Answer 9

Left artium

Question 10

What is this?

Answer 10

Semilunar valve

Question 11

What is this?

Answer 11

Left atrioventricular valve

Question 12

What is this?

Answer 12

Left ventricle

Question 13

What is this?

Answer 13

Right ventricle

Question 14

What is this?

Answer 14

Right atrioventricular valve

Question 15

What is this?

Answer 15

Semilunar valve

Question 16

What is this?

Answer 16

Right atrium

Question 17

What is these?

Answer 17

(TOP) Superior vena cava

(BOTTOM) inferior vena cava

Question 18

What is this?

Answer 18

Pulmonary artery

Question 19

Why is the left ventricle of the heart have thicker more muscular walls than the right ventricle?

Answer 19

Needs to contract powerfully to pump blood all way around the body

right only needs to get to the blood to lungs which are nearby

Question 20

Why do ventricles have thicker walls than the artia?

Answer 20

They need to push blood out of the heart

atria need to push blood a short distance into the ventricles

Question 21

Why is the atrioventricular (AV) valve links to atria to ventricles important?

Answer 21

Stop blood flowing back to atria when ventricles contract

Question 22

Why is the semi-lunar valves (SL) link to ventricles to pulmonary artery and aorta important?

Answer 22

Stop the blood flowing back into the heart after the ventricles contract

Question 23

Why is the cords attach to the atrioventricular valves to the ventricles important?

Answer 23

Stop them being forced up into the atria when the ventricles contract

Question 24

How do the valves work?

Answer 24

Only open one way

whether it is closed or open depends on the relative pressure of the heart chambers

If there’s a higher pressure behind a valve its forced out but if pressure is higher in front of valve it is forced shut

Blood only flows in one direction trough the heart

Question 25

What is the cardiac cycle?

Answer 25

Ongoing sequence of contraction and relaxation of atria and ventricles that keeps the blood contionously circulating round the body

volume of atria and ventricle changes as contract and relax

pressure changes due to changes of chamber volume

Question 26

What happens at 1?

Answer 26

Pressure in the left ventricle is higher than the left atrium

because left ventricle is contrating

AV valve (atrioventricular valve) closes

Question 27

What happens at 2?

Answer 27

Higher pressure in left ventricle than aorta

-SL (semilunar valve) opens

Question 28

What happens at 3?

Answer 28

Higher pressure in aorta than left ventricle

SL (semilunar valve) closes

Question 29

What happens at 4?

Answer 29

Pressure higher in left atrium than left ventricle

left atrium is contracting

Question 30

Between what times are the AV valves are shut?

Answer 30

0.2 to 0.4 seconds

(AV valves are shut when pressure is higher in ventricles than in the atria)

Question 31

Between what times are the ventricles relax?

Answer 31

0.3-0.4 seconds

Ventricles relax volume of chamber increases and pressure falls

As decrease from 16.5 kPa to 7.0

Question 32

Calculate the percentage increase between 0.0 and 0.3 S

Answer 32

16.5 - 0.5 =16

16/0.5 *100 = 3200%