The Lungs

Question 1

Fill in the gaps: Breathing out
When we breathe out, the muscles 1_____ the ribs 2_____ and inwards. The diaphragm moves 3____. The volume inside the chest 4______. This causes air to rush 5____ your lungs.

Answer 1

1: move
2: down
3: up
4: decrease
5: out of

Question 2

What are alveoli?

Answer 2

Alveoli are tiny air pockets. There are millions of them in the Lungs and they increase the surface area of the lungs.

Question 3

Key features of the windpipe.

Answer 3

Starts at the mouth
Goes into the lungs
Splits off to get to the alveoli
Made of cartilage.

Question 4

Key feature of one alveoli

Answer 4

Surrounded by blood cells
They increase the lungs surface area
Very thin walls (only one cells thick)
Surface is moist
Millions in one lung

Question 5

Fill in the gaps: Breathing in
When we breathe in, the muscles 1_____ the ribs 2_____ and outwards. The diaphragm moves 3____. The volume inside the chest 4______. This causes air to rush 5____ your lungs.

Answer 5

1: Move
2: Up
3: Down
4: increase
5: Into

Question 6

Fill in the gap:
We do exercise -> we use muscles more -> _______ -> To make energy we need oxygen and sugars -> Breathing rate increases -> Removes CO2 and takes in O2

Answer 6

Answer:

Muscles need more energy.

Question 7

What is diffusion?

Answer 7

When oxygen and carbon dioxide go through the alveoli into and out of the blood.
Oxygen goes in
Carbon dioxide goes out.

Question 8

What is ventilation?

Answer 8

It is the flow of air through your lungs and mouth/nose.