Respitory System

Question 1

What is the function of the trachea?

Answer 1

Air travels down the trachea which separates into two branches

Question 2

What is the function of the bronchi?

Answer 2

After air has travelled through the trachea it spectators into two branches called bronchi (bronchus = sing.) which each lead to a lung.

Question 3

What is the structure of the trachea and bronchi?

Answer 3

• they are supported by cartilage to open airway and prevent it from collapsing.
• contain many epithelial cells that have hair like projections called cilia. Cilia help move mucus and filter of the bacteria and dirt from entering the lungs.

Question 4

What is the function of alveoli?

Answer 4

Once in the lung, each bronchi branch smaller and smaller until it ends in a tiny air sac called alveoli (alveolus = sing.). These air sacs are only one cell thick for quick gas exchange to occur.

Question 5

How is oxygen carried into the blood stream?

Answer 5

The alveolus is covered by capillaries of bloodstream (circulatory system). The bloodstream carries oxygen and carbon dioxide to different parts of the body.

Question 6

Oxygen moves from alveolus to capillaries through _____.

Answer 6

Diffusion

Question 7

Where does diffusion occur?

Answer 7

Diffusion is a movement form a area of high concentration to low concentration.

Question 8

Exhaling is when…?

Answer 8

Carbon dioxide moves into alveolus by diffusion collected from all the alveoli in the lungs and pushed back up and out the trachea to the mouth and nose.