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biology unit 5 > The heart revision > Flashcards

The heart revision Flashcards

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1
Q

what does the pulmonary circuit do ?

A

Brings deoxygenated blood back into the heart

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2
Q

What does the systematic circuit do?

A

Transports oxygenated blood from the heart throughout the body

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3
Q

what happens on the right side of the heart

A
  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.
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4
Q

Aorta function

A

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

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5
Q

Sinoatrial node(SAN) function

A

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

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6
Q

Atrioventricular node(AVN) function

A

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

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7
Q

Atrioventricular node(AVN) function

A

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

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8
Q

Bundle of HIS function

A

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

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9
Q

Myogenic muscle function

A

Mucles ability to contract without nervous stimulation (they are involuntary

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10
Q

Aorta function

A

Takes oxygenated blood from the heart to the body

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11
Q

Vena cava function

A

brings deoxygenated blood from the body to the right atrium

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12
Q

right atrium function

A

Recieves deoxygenated blood from the vena cava

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13
Q

Tricuspid valve function

A

Prevents backflow from the right ventricle to right atrium

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14
Q

Right ventricle function

A

Contracts to pump blood into pulmonary artery

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15
Q

Semi lunar valve function

A

Prevents back-flow of blood from aorta to the ventricle

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16
Q

Pulmonary artery function

A

Take’s deoxygenated blood to lungs

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17
Q

Pulmonary veins function

A

Carries oxygenated blood from the lungs to the left atrium

18
Q

left atrium function

A

Recieves oxygenated blood from pulmonary veins

19
Q

Bicuspid valve function

A

Prevents backflow from left ventricle to the left atrium

20
Q

left ventricle

A

contracts to pump blood from the aorta

21
Q

Path of blood

A

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

22
Q

how does the heart receive nutrients and oxygen

A

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

23
Q

Diastole meaning

A

Diastole is relaxed

24
Q

atrial diastole meaning

A

When both atria relax and fill with blood

25
Q

atrial diastole meaning

A

When both atria relax and fill with blood

26
Q

Ventricular diastole meaning

A

Ventricles relax and are filled with blood from atria

27
Q

Systole meaning

A

systole is contraction

28
Q

atrial systole meaning

A

Atria contract pushing remaining blood into the ventricles

29
Q

ventricular systole meaning

A

Ventricles contract and pump blood into lungs and body

30
Q

P wave ?

A
31
Q

p wave?

A

atrial systole

32
Q

QRS?

A

ventricular systole

33
Q

T wave ?

A

Diastole

34
Q

arteries function and description

A

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

35
Q

arterioles function and description

A

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

36
Q

Capillaries function and description

A

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

37
Q

venules function and description

A

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

38
Q

veins function and description

A

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

39
Q

Which ventricles pressure is lower and why

A

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

40
Q

how is the endothelium adapted for its function

A

smooth to prevent friction

41
Q

function of coronary artery

A

supply of blood to the heart

biology unit 5 (2 decks)

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