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Biology 2 term 1 1/2 year 8 > L2: interrelated systems > Flashcards

L2: interrelated systems Flashcards

1
Q

what 3 organ systems work together for breathing and respiration?

A

respiratory system, digestive system, circulatory system

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2
Q

what are the main organs of the digestive system?

A

there are 9 organs: salivary gland, oesophagus, stomach, liver, gall bladder, pancreas, small intestine, large intestine and rectum

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3
Q

why do we need to digest food?

A

to make it smaller

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4
Q

why do we need to make food smaller?

A

to absorb all the nutrients into our blood (big chunks of food can’t move into the blood)

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5
Q

what happens when the food is in our blood?

A

our cells can access it and use it

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6
Q

which food group is our main source of energy?

A

carbohydrates

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7
Q

what are carbohydrates made of?

A

glucose

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8
Q

why do we need glucose?

A

it is one of the things we need to be able to do respiration and release energy

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9
Q

how many seconds does it take for a blood cell to circulate the whole body?

A

20

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10
Q

how many swimming pools can your blood fill in your lifetime?

A

100

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11
Q

how many times does your heart beat per day?

A

100 000

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12
Q

if all of your blood vessels in your body were laid end to end, how many miles would they extend?

A

60 000

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13
Q

how many litres of blood are in your body?

A

5

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14
Q

how many miles can one blood cell travel in a day?

A

12 000

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15
Q

what is the circulatory system made of?

A

the heart, blood vessels, blood

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16
Q

what does our circulatory system do?

A

transports all of the raw materials cells need to function, collects all of cells waste products, deliver to right places of removal

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17
Q

what are the routes/roads of our circulatory system?

A

blood vessels

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18
Q

what are the transporters of our circulatory system?

A

blood

19
Q

what is the pump that moves our blood around in our circulatory system?

A

heart

20
Q

what six things are in plasma?

A

water, glucose and other nutrients, minerals, urea, carbon dioxide and nitrogen, hormones

21
Q

what colour is the substance plasma?

A

straw-coloured

22
Q

what texture is plasma?

A

watery

23
Q

what is urea?

A

a waste product of the breakdown of amino acids and is excreted by kidneys

24
Q

how do the red blood cells carry oxygen?

A

by using a protein called haemoglobin

25
Q

what do white blood cell protect us against?

A

infection

26
Q

what are platelets?

A

they are bits of dead cells that clot to make scabs

27
Q

what do arteries do?

A

take blood from the heart to the organs of the body

28
Q

what do veins do?

A

take blood back from the organs to the heart

29
Q

what do capillaries do?

A

transport blood between arteries and veins (also responsible for gaseous exchange)

30
Q

what is the double circulatory system?

A

where blood passes through the heart twice and has two separate circuits, one for oxygenated blood and one for deoxygenated blood

31
Q

which side of the heart is oxygenated blood?

A

left

32
Q

which side of the heart is deoxygenated blood?

A

right

33
Q

what is the heart made of?

A

the heart is made of entirely of muscle

34
Q

how is it unlike any other muscle in the body?

A

it never tires

35
Q

how is oxygenated blood carried to the heart?

A

by the coronary arteries

36
Q

does the heart need a blood supply?

A

although it is full of blood, it does need its own blood supply

37
Q

what is the top chamber of the heart called?

A

atrium

38
Q

what is the bottom chamber of the heart called?

A

ventricle

39
Q

which side of the heart gives the lungs deoxygenated blood?

A

right

40
Q

which side of the heart gets oxygenated blood from the lungs ?

A

left

41
Q

what is the first step of blood circulation?

A

blood gets pumped from the heart to the lungs and pick up oxygen

42
Q

what is the second step of blood circulation?

A

the blood is then taken back to the heart

43
Q

what is the third step of blood circulation?

A

the heart pumps the blood to intestine (where oxygen and glucose are removed)

44
Q

what is the fourth step of blood circulation?

A

oxygen and glucose removed for respiration, blood is sent back to heart and starts again

Biology 2 term 1 1/2 year 8 (5 decks)

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