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Junior Cert Science- > The Circulation System > Flashcards

The Circulation System Flashcards

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0
Q

What is plasma

A

The liquid part of the blood

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1
Q

What is blood made up of

A

Plasma and blood cells

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2
Q

What are the 3 types of blood cells

A

Red blood cells
White blood cells
Platelets

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3
Q

What is the function on red blood cells

A

Carries oxygen around the body

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4
Q

What is the function of white blood cells

A

Fight infection

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5
Q

What is the function of platelets

A

Cause the blood to clot

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6
Q

What are the functions of blood

A

Transport: the blood transports food, oxygen and hormones around the body
Defence against disease: white blood cells fight infection and platelets clot the blood preventing microorganisms for entering the blood

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7
Q

What do blood vessels do

A

Carry blood around the body

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8
Q

What are the three types of blood vessels

A

Arteries
Veins
Capillaries

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9
Q

What is the function of arteries

A

They carry blood away from the heart

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10
Q

Describe an artery

A

They have a thick muscle wall and narrow lumen they have no valves

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11
Q

Shat is a lumen

A

The space blood flows in

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12
Q

What is the function of vein

A

They carry blood to the heart

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13
Q

Describe a vein

A

They have a thin muscle wall and a wide lumen. They have valves to prevent the backflow of blood

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14
Q

What is the function of capillaries

A

They link arteries to veins

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15
Q

Describe a capillar

A

Their wall is only one cell thick and this allows substances to pass in and out of the blood

16
Q

What is the circulation system

A

Oxygenated blood is brought from the lungs to the heart

Oxygenated blood is brought all around the body

Deoxygenated blood Is brought from the body to the heart

Deoxygenated blood is brought to the lungs

17
Q

What is heart disease caused by

A

Mainly by blood vessels in the heart clogging

18
Q

How can you prevent heart disease

A

Regular exercise a healthy diet not smoking and avoiding stress

Junior Cert Science- (39 decks)

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