Human Respiratory System

What is the function of the human respiratory system?

• To pump blood throughout the body

• To filter the air we breathe

• To digest food and absorb nutrients

• To control our body temperature

Where does the air enter our body when we breathe in?

• Through the mouth

• Through the ears

• Through the skin

• Through the nostrils

What is the purpose of the tiny hair in our nostrils?

• To collect germs and other particles

• To produce mucus

• To filter oxygen from the air

• To help us smell

What is the function of the trachea?

• To carry air into each lung

• To filter the air we breathe

• To produce mucus

• To separate the chest cavity from the abdominal cavity

What are the small and spongy air sacs called?

• Bronchi

• Alveoli

• Cilia

• Trachea

Where does the exchange of oxygen and carbon dioxide happen?

• In the nostrils

• In the windpipe

• In the bronchi

• In the alveoli

What is the function of the diaphragm?

• To filter the air we breathe

• To separate the chest cavity from the abdominal cavity

• To carry air into each lung

• To control our body temperature

How many lobes does the right lung have?

• One

• Two

• Three

• Four

Which lung is slightly smaller in size?

• Right lung

• Left lung

• Both lungs are the same size

• Lungs do not have different sizes

What is the purpose of the mucus in the bronchi?

• To collect germs and other particles

• To carry air into each lung

• To filter oxygen from the air

• To help us smell