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Biology Unit 5 > Cardiovascular System > Flashcards

Cardiovascular System Flashcards

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1
Q

Chambers of the heart

A

Atria and ventricle

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2
Q

Function of septum

A

Divides the left and right sides

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3
Q

Function of semi-lunar valve

A

Prevent back flow into ventricles

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4
Q

Tricuspid valve

A

Between right atrium and ventricle

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5
Q

Bicuspid valve

A

Between left atrium and ventricle

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6
Q

Vena cava

A

Brings deoxygenated blood to the heart

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7
Q

Pulmonary vein

A

Carries oxygenated blood from lungs to heart

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8
Q

Pulmonary artery

A

Sends deoxygenated blood to the lungs

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9
Q

Aorta

A

Largest artery distributes oxygenated blood

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10
Q

Myogenic muscle

A

Heart muscle contracts without nerve signals

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11
Q

(SAN)

A

Heart’s pacemaker, initiates heartbeat

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12
Q

(Avn)

A

Delays impulse for ventricular filling

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13
Q

Bundle of his and Purkinje fibres

A

Conducts impulses for ventricular contraction

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14
Q

Cardiac output

A

Heart rate x stroke volume

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15
Q

Arteries

A

Elastic, thick muscle, small lumen, high pressure

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16
Q

Veins

A

Thin walls, large lumen, valves, low pressure

17
Q

Capillaries

A

One cell thick, diffusion site, connects arteries to veins

18
Q

Atrial systole

A

Atria contract

19
Q

Ventricular systole

A

Ventricles contract

20
Q

Cardiac diastole

A

Heart relaxes

21
Q

Major blood vessels

A

Vena cava, pulmonary vein/ artery, Aorta, coronary artery

22
Q

Arrhythmias

A

Irregular heartbeat

23
Q

CVD treatments

A

Antihypertensive’s, statins, transplants and immunosuppressants

24
Q

P wave

A

Atrial depolarisation - electrical impulse starts at the SAN and spreads across to the atria, causing them to contract and push blood into the ventricles

25
Q

QRS complex

A

Ventricular depolarisation, The electrical signal passes through the AVN down the bundle of his and purkinje fibres leading to ventricular contraction

26
Q

T wave

A

Ventricular repolarisation, this is when the ventricles relax und prepare for the next contraction

27
Q

Cardiac cycle

A
  • Atrial Systole: Atria contract, blood flows into ventricles, AV valves open.
  • Ventricular Systole: Ventricles contract, blood flows into arteries, AV valves close, semi-lunar valves open.
  • Cardiac Diastole: Heart relaxes, blood flows into atria, AV valves open, semi-lunar valves close.

Biology Unit 5 (2 decks)

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