Respiratory system

Front

What is the main purpose of the lungs?

Back

allow oxygen into the body

Front

Normal respiration involves:

• the use of intercostal muscles
• the use of a muscular diaphragm
• the use of intercostals and the diaphragm
• something different

Back

the use of intercostals and the diaphragm

Front

The normal oxygen content of inhaled air is approximately

Back

21%

Front

The normal carbon dioxide content of exhaled air is approximately

Back

4%

Front

The main tube connecting the mouth to the lungs is the

Back

trachea

Front

From the trachea the airway splits into

Back

bronchioles

Front

Specialist cells in the bronchioles have structures on them called

Back

cilia

Front

Why do you need mucous membranes in the bronchioles?

Back

to trap and remove foreign particles

Front

At the end of the bronchioles are structures called

Back

alveoli

Front

How are alveoli and villi similar?

Back

By cell thickness