Science 8 | Biology | Unit 4. Respiration The human respiratory system

Choose the correct answer.
What is the name of the muscle below the lungs that helps with breathing?

alveoli
trachea
bronchi
diaphragm

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diaphragm
alveoli
trachea
bronchi

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Choose the correct answer.
When you breathe, your lungs take in
and remove
.

oxygen - carbon dioxide
waste - air
Incorrect air - oxygen
carbon dioxide - waste

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oxygen - carbon dioxide
waste - air
carbon dioxide - waste
Incorrect air - oxygen

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Choose the correct answer.
What is the main function of the respiratory system?

to break down food and absorb nutrients
to provide oxygen and remove carbon dioxide from the body
to bring oxygen to the body
to remove oxygen from the body and deliver carbon dioxide

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to provide oxygen and remove carbon dioxide from the body
to bring oxygen to the body
to remove oxygen from the body and deliver carbon dioxide
to break down food and absorb nutrients

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Fill in the blank.
The organs that help to get oxygen from the air into your blood, and to get rid of carbon dioxide, make up the
.
Đáp án
The organs that help to get oxygen from the air into your blood, and to get rid of carbon dioxide, make up the
respiratory system
.
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respiratory system
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Fill in the blank.
Inside the lungs, oxygen passes from the air into the blood, and carbon dioxide passes out of the blood into the air. This is called
.
Đáp án
Inside the lungs, oxygen passes from the air into the blood, and carbon dioxide passes out of the blood into the air. This is called
gas exchange
.
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gas exchange
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Choose the correct answer.
How is carbon dioxide released from the body?

When we sweat
When we exhale
When we inhale
When we urinate

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When we exhale
When we sweat
When we urinate
When we inhale

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The following sentences are TRUE (T) or FALSE (F)?

True False
The oxygen comes from the air around you. About 60% of the air is oxygen
The carbon dioxide that your cells produce goes back into the air around you. About 0.04% of the air is carbon dioxide

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True False
The oxygen comes from the air around you. About 60% of the air is oxygen
The carbon dioxide that your cells produce goes back into the air around you. About 0.04% of the air is carbon dioxide

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Choose the correct answer.
What are the main organs of gas exchange in the respiratory system?

bronchi
lungs
trachea
diaphragm

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lungs
diaphragm
trachea
bronchi

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Fill in the gaps in sentences below.

trachea
trachea
bronchi
bronchi
When you breathe in, air flows through the
and then into the two
, which carry it deep inside the lungs. When you breathe out, air flows back in the opposite direction.

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When you breathe in, air flows through the
trachea
and then into the two
bronchi
, which carry it deep inside the lungs. When you breathe out, air flows back in the opposite direction.

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Choose the correct answer.
What is the function of the bronchi?

Transport air from trachea to lungs
Transport air from alveoli to blood
Transport air from nose to lungs
Transport air from lungs to alveoli

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The correct answer

Transport air from trachea to lungs
Transport air from nose to lungs
Transport air from lungs to alveoli
Transport air from alveoli to blood

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	True	False
The oxygen comes from the air around you. About 60% of the air is oxygen
The carbon dioxide that your cells produce goes back into the air around you. About 0.04% of the air is carbon dioxide