The Respiratory System

The _____ are the primary organs in the respiratory system.

• bronchi

• lungs

• diaphragm

• larynx

The nasal passage is a part of the _____.

• upper respiratory tract

• lower respiratory tract

The trachea is a part of the _____.

• upper respiratory tract

• lower respiratory tract

The main gases exhanged during the respiratory process are ____ and ____.

• oxygen / carbon dioxide

• oxygen / nitrogen

• carbon dioxide / methane

• oxygen / helium

Why is the left lung smaller than the right?

• Because most people are right-handed.

• To make room for the heart.

• Because the digestive system shares space in the body.

• So that the diaphragm has space to expand.

Cilia are responsible for ____.

• Making you sick.

• Getting your nose dirty.

• Cleaning out mucus.

• Converting oxygen to CO2.

The diaphragm ____.

• Always stays the same size.

• Is not a very useful muscle.

• Expands when we are inhaling.

• Expands when we are exhaling.

In which parts of the respiratory system does the actual transfer of CO2 and oxygen take place?

• The lungs

• The trachea

• The bronchi

• The alveoli

a

b

c

d

e

esophagus

diaphragm

trachea

lungs

bronchi