Air and Living Things (Humans)

The respiratory system allows _______ _______ to take place between the body and the surroundings.

When you exhale, which of these increases (as compared to when you ihaled it)? Tick all that apply.

• amount of carbon dioxide

• amount of oxygen

• amount of water vapour

• temperature of your breath

• amount of dust in your breath

When you inhale, your ribcage moves ..

• outwards and upwards

• outwards and downwards

• inwards and upwards

• inwards and downwards

What are these tiny structures in your lungs called?

What is the function of the air sacs?

• gaseous exchange

• increase surface area

• increase the amount of oxygen in the blood

What is the function of the gill filaments in a fish?

• gaseous exchange

• increase surface area

• increase the amount of oxygen in the blood

If pneumonia causes the air sacs to be filled with fluid, will the person's breathing rate be faster or slower?

• Faster

• Slower

If pneumonia causes the air sacs to be filled with fluid, explain why the person's breathing rate will be faster.

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