respiratory system

Question 1

Structure

Answer 1

Three things:
* lungs
* diaphragm
* Alveoli

Question 2

Inspiration

Answer 2

• Diaphragm contracts
• Thorac cavity expands
• air pressure in the lungs drops
• air drawn into lungs due to pressure difference

Question 3

Expiration

Answer 3

• Diaphragm relaxes
• pleural cavity contracts
• air pressure in the lungs increases
• air is pushed out of the lungs

Question 4

Air passage

Answer 4

Nasal cavity >Pharynx > Larynx > Trachea > Bronchi > Branchioles > Alveoli