Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.

• Alveoli

• Bronchioles

• Capillaries

Two organs that remove oxygen from the air and pass it into your blood.

• Mouth and nose

• Sinuses

• Lungs

the network of organs and tissues that help you breathe is called

• Diggestion System

• Respiratory system

How many lungs do you have?

• 0

• 1

• 2

• 3

What is it called when you breathe in through your nose or mouth?

• Inhale

• Exhale

• Unhale

• Dehale

What gas do we breath out as waste?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon Dioxide

How does your chest change during inhalation?

• getting bigger

• getting smaller

• no change

Gas exchange is needed to supply _____________ to cells and remove __________________ from cells. Hint: look under ALVEOLI in your notes.

• carbon dioxide; oxygen

• oxygen; food

• oxygen; carbon dioxide

• carbon dioxide; water

Letter D in this diagram is

• pharynx

• bronchiole

• trachea

• alveoli

The two tubes that the trachea splits into (letter E) are known as the ______.

• pharynx

• bronchi

• trachea

• alveoli