The Respiratory System

These apply to inhalation. Tick all that apply.

• Diaphragm moves up

• Ribs move in

• Ribs move out

• Diaphragm contracts

• Creates larger pressure in thoracic cavity

These apply to exhalation. Tick all that apply.

• Diaphragm relaxes

• Pressure increases in thoracic cavity

• Pressure is less outside the body

• Diaphragm moves down

What causes change in pressure when we breathe?

• Carbon dioxide levels

• Oxygen levels

• Diaphragm movement

• Hypoxia

What is the main function of the respiratory system?

• To provide oxygen and remove carbon dioxide from the body

• To bring oxygen to the body

• To break down food and absorb nutrients

• To remove oxygen from the body and deliver carbon dioxide

What are the main organs of gas exchange in the respiratory system?

• Diapragm

• Lungs

• Trachea

• Bronchi

What are the tiny air sacs that allow for diffusion between oxygen and carbon dioxide?

• Bronchi

• Bronchioles

• Trachea

• Alveoli