The Respiratory System 🫁

Question 1

What is Inspiration? (role of the diaphragm)

Answer 1

Contracts and flattens
Ribs up and out
Chest cavity expands

Question 2

What is Expiration? (role of the diaphragm)

Answer 2

relaxes
Ribs down and in
Diaphragm back to dome shape

Question 3

Process of inspiration

Answer 3

1. The diaphragm contracts and flattens increasing the size of the chest cavity
2. Pressure inside the lungs decreases and air enters the body through the nose and mouth
3. Air goes down the trachea
4. Trachea splits into 2 bronchi (one to each lung)
5. Bronchi split into smaller bronchioles
6. Bronchioles have small air sacs at the end called alveoli
7. Diffusion takes place at the alveoli
8. Diaphragm relaxes back into a dome shape
9. Pressure inside the lungs increases and air is forced out of the nose and mouth

Question 4

What is tidal volume?

Answer 4

This is the amount you breathe in and out in one normal breath.

Question 5

What is vital capacity?

Answer 5

This is the maximum volume of air you can breathe out after breathing in as much as you can. (peak flow)

Question 6

Where does gaseous exchange take place?

Answer 6

Alveoli

Question 7

What are alveoli and what do they do?

Answer 7

The alveoli are tiny air sacks inside the lungs.
When you breathe in, they fill with air.