The Lungs

Question 1

Where are the Lungs?

Answer 1

They are in the Thorax which is the top part of your body

Question 2

What is the lungs separated from the lower part of the body from

Answer 2

The diaphragm

Question 3

What protects the lungs

Answer 3

The rib cage

Question 4

Where does the air you breathe in go through

Answer 4

It goes through the trachea

Question 5

What happens from the trachea

Answer 5

It splits into two tubes called bronchi each one is called bronchus
The bronchi split into smaller tubes called bronchioles
The bronchioles end at small bags called alveoli where gas exchange takes place

Question 6

What happens in gas exchange with alveoli

Answer 6

The blood next to alveoli contains Carbon Dioxide and very little Oxygen
Oxygen diffuses out of the alveolus (high conc) into the blood (low conc)
Carbon dioxide diffuses out of the blood (high conc) into the alveolus (low conc) to be breathed out.
When the blood reaches body cells oxygen is released from the red blood cells (high conc) and diffuses into the body cells (low conc)
Same time Carbon dioxide diffuses out of the body cells(high conc) into the blood(low conc) it is then carried back to the lungs

Question 7

What is the equation for breaths per minute

Answer 7

Breaths per min=Number of breaths/Number of minutes

Question 8

During a 12 minute ru, Aaqib took 495 breaths. Calculate his average breathing rate in breaths per minute (1 mark)

Answer 8

495/12 =41.25 breaths per minute