Process of Inspiration and Expiration (Thoracic Volume & Pressure)

Question 1

What is the process of breathing in?

Answer 1

1 - Diaphragm contracts and move down, intercostal muscles pull the ribs out.
2 - Thoracic cavity volume increases.
3 - Air pressure in lungs decreases (fewer collisions in the lungs)
4 - Air particles move from high pressure to low pressure.
5 - Air rushes into lungs.

Question 2

What is the process of breathing out?

Answer 2

1 - Diaphragm relaxes and moves up, intercostal muscles relax the rib cage.
2 - Thoracic cavity volume decreases.
3 - Air pressure in lungs increases (many more collisions in the lungs)
4 - Air particles move to low pressure from high pressure.
5 - Air rushes out of lungs.

Question 3

What is the thoracic cavity?

Answer 3

Is the lung volume (how much room/space is on the lungs)