1st Quarter Reviewer

What is the main function of the respiratory system?

• To pump blood

• To digest food

• To exchange gases

• To control hormones

Which organ is the main site for gas exchange?

• Heart

• Brain

• Lungs

• Kidneys

What gas do we inhale from the atmosphere?

• Carbon dioxide

• Oxygen

• Nitrogen

• Hydrogen

What gas do we exhale as a waste product?

• Oxygen

• Carbon dioxide

• Nitrogen

• Helium

What muscle helps the lungs in breathing?

• Trachea

• Bronchus

• Diaphragm

• Alveoli

Which part connects the throat to the lungs?

• Trachea

• Esophagus

• Alveoli

• Diaphragm

The tiny air sacs in the lungs where gas exchange occurs are called:

• Bronchi

• Capillaries

• Alveoli

• Villi

What protects the lungs and helps them expand?

• Skull

• Rib cage

• Spine

• Pelvis

What structure prevents food from entering the windpipe?

• Tonsils

• Uvula

• Epiglottis

• Larynx

Which of the following is NOT a part of the respiratory system?

• Nose

• Trachea

• Liver

• Lungs