Respiratory system

Question 1

What does the respiratory system do?

Answer 1

It is responsible for taking oxygen in our body and removing CO2 from our body

Question 2

3 structures

Answer 2

Lungs
Bronchi
trachea (windpipe)

Question 3

How it works

Answer 3

Air first comes enters the nose or mouth then goes down to the pharynx (throat)

When it enters the pharynx it moves to the trachea (windpipe) and divides into 2 bronchi

Bronchi lead to the lungs.

The cells that line the bronchi and trachea are covered in cilia, cilia are embedded in mucus. The cilia also moves debris in and out of the airways.

The mucus traps foreign particles and the cilia sweeps them away from the lungs.

Question 4

Explain gas exchange

Answer 4

The bronchi branch into smaller bronchioles and these bronchioles end up in aveolis. alveoli are tiny sacs, surrounded by a capillary wall (one cell thick), and is where gas exchange happens.
In the alveoli, oxygen enters red blood cells through capillary walls by diffusion. Then, the oxygen is brought to other body cells.
the carbon dioxide (waste) is brought from the cells enter the alveoli through capillary walls by diffusion and then the CO2 is breathed out.

Question 5

What happens in exhalation

Answer 5

The rib cage gets smaller and the rib cage muscles relax - diaphragm moves up

Question 6

What happens in Inhalation

Answer 6

The rib cage expands and the rib cage muscles contract - diaphragm moves down

Question 7

What is asthma

Answer 7

• is a long-term disease
• Causes difficulty in breathing at times
• Bronchis becomes narrow and swelling happens by to much production

Question 8

Symptoms of Asthma

Answer 8

• Wheezing
• Breathing fast
• Blue lips and feet
• Fainting

Question 9

Solutions to asthma

Answer 9

Inhalers
- Inhalers contain steroid medicine that reduces the inflammation of the airways or a medication that opens the air ways.