Respiratory and Circulatory Systems

Where does air enter the respiratory system?

• trachea

• nose/mouth

• lungs

• bronchi

What organ of the respiratory system is often called the windpipe?

• nose/mouth

• pharynx

• trachea

• diaphragm

When the diaphragm contracts (pulls down), what happens?

• You inhale (air enters)

• You exhale (air leaves)

• Nothing happens

When the diaphragm relaxes (pushes up), what happens?

• You inhale (air enters)

• You exhale (air leaves)

• Nothing happens

Where does gas exchange actually occur?

• trachea

• bronchi

• diagram

• alveoli

Which organ of the respiratory system is also an organ of the muscular system?

• nose

• trachea

• lungs

• diaphragm

Which of the following is the main function of the respiratory system?

• Transport materials throughout the human body

• Provide gas exchange between blood and air

• Create red blood cells

• Provide movement for the body

Alveoli are filled with these tiny blood vessels.

• capillaries

• veins

• arteries

• white blood cells

What is the function of the circulatory system?

• Make red blood cells

• Provide gas exchange between blood and air

• Transport needed materials throughout the body

• Provide movement for the body

What is the main organ of the circulatory system?

• arteries

• veins

• capillaries

• heart