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Yr10 Biology > Topic 2 The circulatory system > Flashcards

Topic 2 The circulatory system Flashcards

1
Q

Parts of the circulatory system

A

Heart, Blood vessels, blood

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2
Q

Function of Circulatory system

A

To transport materials around the body to and from cells e.g. oxygen, nutrients, waste, carbon dioxide

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3
Q

Why Double circulatory system

A

Blood has to travel through the heart twice for one complete circuit of the body - Right side sending to the lungs to collect oxygen, left side sending blood out to the body to deliver food and oxygen and collect waste

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4
Q

Function of heart

A

To pump blood round the body

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5
Q

How many chambers in the heart

A

4

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6
Q

Which side of the heart sends blood to the lungs

A

Right

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7
Q

Which side of the heart sends blood to the body

A

Left

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8
Q

What is oxygenated blood

A

Blood rich in oxygen

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9
Q

WHat is deoxygenated blood

A

Blood low in oxygen (rich in Carbon dioxide)

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10
Q

WHich side the heart receives oxygenated blood

A

LEFT

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11
Q

Which side of the heart has thicker walls and why

A

Left - has to pump blood around the body

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12
Q

What are the valves needed for in heart and veins

A

To stop blackflow of blood - ensure it flows in one direction

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13
Q

What are the 3 main types of blood vessels

A

Arteries, Veins, Capillaries

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14
Q

What are the main features of arteries

A

Thick elastic and muscle walls
small lumen
carry blood away from heart
blood is at high pressure

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15
Q

What are the main features of veins

A

Thinner elastic and muscle walls
Carry blood back to heart
Carry blood at low pressure
have valves to prevent backflow of blood
Have a large lumen

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16
Q

What are the main features of capillaries

A

Have walls only 1 cell thick
Allow materials to enter and leave the blood eg oxygen, food, waste
Carry blood at low speed and pressure

17
Q

What are the main parts of the blood

A

Red blood cells
White blood cells
Platelets
Plasma

18
Q

What is the function of red blood cells

A

To carry oxygen

19
Q

What is the pigment found in red blood cells and what does it do

A

Pigment - Haemoglobin
Job - to join with oxygen and form oxyhaemoglobin in the lungs and release the oxygen at the cells

20
Q

What is the function of white blood cells

A

To fight infection

21
Q

What is the function of plasma

A

To carry food, waste, hormones (as well as blood cells)

22
Q

What colour is plasma

A

yellow

23
Q

How are white blood cells and red blood cells different

A

White blood cells are larger and have a nucleus - there are less of them than RBC
Red blood cells have no nucleus, have a biconcave shape to allow them to carry more oxygen and there are many of them

24
Q

What is the job of platelets

A

They help clot blood - help form a scab

25
Q

Why does your heartrate increase when you exercise

A

To deliver more oxygen and nutrients to the cells so more energy can be released

Yr10 Biology (5 decks)

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