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Steps2Success > Circulatory system > Flashcards

Circulatory system Flashcards

1
Q

label this

A
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2
Q

what is the circulatory system?

A

double circulatory: one to the body and one to the lungs

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3
Q

which artery takes blood to the lungs?

A

pulmonary artery

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4
Q

which vein takes deoxygenated blood to the heart?

A

vena cava

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5
Q

how does oxygenated blood enter the heart?

A

through the pulmonary vein

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6
Q

how does the oxygenated blood enter the body?

A

through the aorta

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7
Q

what do the coronary arteries do?

A

The coronary arteries provide the heart muscle with the glucose and oxygen it needs for
respiration

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8
Q

what do arteries do?

A

carry oxygenated blood away from the heart

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9
Q

what is adaption of artery?

A

thick muscular walls to make them strong
and elastic fibres to stretch so they can withstand high blood pressure

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10
Q

what is adaption of veins

A

low pressure blood so don’t have thick walls, valves to ensure blood is moving in one direction

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11
Q

purpose for capillaries?

A

responsible for gas exchange oxygen diffuses out and carbon dioxide diffuses in.

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12
Q

adaptions of capillaries

A

have very thin walls only one cell thick to allow diffusion to happen quickly because of the short diffusion pathway, meaning there is a large surface area to maximise diffusion

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13
Q

what do coronary arteries do?

A

supply the heart with blood

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14
Q

what muscle is the heart made of?

A

cardiac muscle

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15
Q

what happens in coronary heart disease?

A

fatty/ plaque deposits narrow the coronary arteries, lessening blood flow and creating blood clots

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16
Q

why is coronary heart disease happening?

A

poor diet - obesity and high cholesterol levels blocking arteries
smoking - walls of arteries damaged by chemical levels in tar

17
Q

how can coronary heart disease be treated?

A

by balloon angioplasty (stents) they are tubes placed in the artery to keep it open and allow blood flow

18
Q

advantages of stents?

A

effective for long periods of time
short recovery period
useful for those who cannot take drugs

19
Q

disadvantages of stents?

A

risk of infection
surgery needed

20
Q

how does it work?

A

1) stent with balloon inserted into partially blocked artery
2) balloon inflated to expand stent and push plaque against walls of artery
3) balloon removed from expanded stent, allowing blood to flow

Steps2Success (13 decks)

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