The heart revision

Question 1

what does the pulmonary circuit do ?

Answer 1

Brings deoxygenated blood back into the heart

Question 2

What does the systematic circuit do?

Answer 2

Transports oxygenated blood from the heart throughout the body

Question 3

what happens on the right side of the heart

Answer 3

1. Deoxygenated blood enters right attium and it contracts
2. Tricuspid valve opens into right ventricle
3. Blood enters ventricle and tricuspid valve closes to prevent back flow
4. Pulmonary valve opens and lets blood out the heart into pulmonary artery to the lungs, collects oxygen.

Question 4

Aorta function

Answer 4

Main blood vessel which oxygenated blood passes through from the heart to the rest of the body

Question 5

Sinoatrial node(SAN) function

Answer 5

The pacemaker of the heart- generates electrical signal that causes upper heart chambers( atria) to contract

Question 6

Atrioventricular node(AVN) function

Answer 6

controls the passage of the heart’s electrical signal from the atria to the ventricles

Question 7

Atrioventricular node(AVN) function

Answer 7

controls the passage of the heart’s electrical signal from the atria to the ventricles

Question 8

Bundle of HIS function

Answer 8

part of the electrical impulses that travel through the heart. Divides into left and right which stimulate the left and right ventricles

Question 9

Myogenic muscle function

Answer 9

Mucles ability to contract without nervous stimulation (they are involuntary

Question 10

Aorta function

Answer 10

Takes oxygenated blood from the heart to the body

Question 11

Vena cava function

Answer 11

brings deoxygenated blood from the body to the right atrium

Question 12

right atrium function

Answer 12

Recieves deoxygenated blood from the vena cava

Question 13

Tricuspid valve function

Answer 13

Prevents backflow from the right ventricle to right atrium

Question 14

Right ventricle function

Answer 14

Contracts to pump blood into pulmonary artery

Question 15

Semi lunar valve function

Answer 15

Prevents back-flow of blood from aorta to the ventricle

Question 16

Pulmonary artery function

Answer 16

Take’s deoxygenated blood to lungs

Question 17

Pulmonary veins function

Answer 17

Carries oxygenated blood from the lungs to the left atrium

Question 18

left atrium function

Answer 18

Recieves oxygenated blood from pulmonary veins

Question 19

Bicuspid valve function

Answer 19

Prevents backflow from left ventricle to the left atrium

Question 20

left ventricle

Answer 20

contracts to pump blood from the aorta

Question 21

Path of blood

Answer 21

vena cava - right atrium- tricuspid valve- right ventricle- semi lunar valve- pulmonary arteries- lungs- pulmonary veins- left atrium- bicuspid valve- left ventricle- semi lunar valve- aorta- body organs

Question 22

how does the heart receive nutrients and oxygen

Answer 22

through the coronary arteries- when they become blocked a heart attack is likely

Question 23

Diastole meaning

Answer 23

Diastole is relaxed

Question 24

atrial diastole meaning

Answer 24

When both atria relax and fill with blood

Question 25

atrial diastole meaning

Answer 25

When both atria relax and fill with blood

Question 26

Ventricular diastole meaning

Answer 26

Ventricles relax and are filled with blood from atria

Question 27

Systole meaning

Answer 27

systole is contraction

Question 28

atrial systole meaning

Answer 28

Atria contract pushing remaining blood into the ventricles

Question 29

ventricular systole

Answer 29

Ventricles contract and pump blood into lungs and body

Question 30

P wave ?

Question 31

p wave?

Answer 31

atrial systole

Question 32

QRS?

Answer 32

ventricular systole

Question 33

T wave ?

Answer 33

Diastole

Question 34

arteries function and description

Answer 34

Carries oxygenated blood AWAY from heart Has thick outer layer of collagen fibres has thick muscle layer Has thick elastic layer Has no valves

Question 35

arterioles function and description

Answer 35

Carries oxygenated blood from arteries to cappilaries Has tough outer layer of collagen fibres Has thicker muscle layer than arteries Thinner elastic layer rhan arteries No valves

Question 36

Capillaries function and description

Answer 36

Exchange of materials Doesnt have touch outer layer of collagen fibres doesnt have muscle layer Absent elastic layer No valves

Question 37

venules function and description

Answer 37

Carries oxygenated blood from cappilaries to veins Has tough outer layer of collagen fibres has thin muscle layer thin elastic layer no valves

Question 38

veins function and description

Answer 38

returns blood from organs back to heart has tough outer layer of collagen fibres Thin muscle Thin elastic layer Has valves- blood travels at low blood pressure so prevents backflow

Question 39

Which ventricles pressure is lower and why

Answer 39

Right side, it has thinner muscle layer(because it pumps blood to lungs) So it produces less pressure during contraction because less resistance to overcome

Question 40

how is the endothelium adapted for its function

Answer 40

smooth to prevent friction

Question 41

function of coronary artery

Answer 41

supply of blood to the heart