04 Breathing and Health 1

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

This is a tube about 12cm long with c-shaped rings of cartilage to keep it open

• Nasal cavity
• Trachea
• Mouth Cavity
• Pharynx

Clusters of tiny air sacs that allow the exchange of oxygen and carbon dioxide

• Pharynx
• Diaphragm
• Alveoli
• Lungs

Muscular structure that helps to expand and contract the lungs, forcing air in and out

• Pharynx
• Nasal cavity
• Alveoli
• Diaphragm

Name the organ label # 2 . 

• alveoli 
• bronchi 
• trachea 
• lungs 

I have a large surface area to increase how much oxygen and carbon dioxide can pass to and from the blood stream

• Trachea
• Bronchi
• Alveoli

I am the tube leading from the trachea into each lung

• Trachea
• Bronchi
• Alveoli

I make up a movable cage to protect the lungs

• Ribs
• Intercostal Muscles
• Diagraphm

The cardiovascular (circulatory) and respiratory system work closely together.

• True
• False

What happens to your pulse when you exercise?

• It increases
• It decreases
• It stays the same