The Respiratory System

Question 1

Pathway of oxygen:

Answer 1

Air enters the nose/mouth, air travels down the trachea, trachea divides into 2 tubes called bronchi, bronchi divide into smaller bronchioles and at the end of the bronchiole are tiny sacs called alveoli.

Question 2

What are the two main functions of the respiratory system:

Answer 2

To transport oxygen into the body and to remove carbon dioxide and other waste products out of the body.

Question 3

Define gaseous exchange:

Answer 3

The exchange of oxygen and carbon dioxide in the alveoli.

Question 4

Define epiglottis:

Answer 4

Prevents food going into your lungs.

Question 5

Mechanics of breathing: to breath in:

Answer 5

Intercostal muscles contract, diaphragm contracts and flattens, this makes chest cavity larger.

Question 6

Mechanics of breathing: to breath out:

Answer 6

Intercostal muscles and diaphragm relax, makes chest cavity smaller and increases air pressure.