Letter D in this diagram is

Bronchioles are

Air enters the respiratory system through the nose or mouth. It next enters the

Air enters the trachea and then enters the

When inhaling, air moves from the bronchi into the tubes known as the

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

__________ are air sacs where gas exchange takes place.

The yellow structures on the right side of this picture represent ________.

Carbon dioxide gas has the chemical formula

Oxygen gas has the chemical formula

Carbon dioxide gas has the chemical formula ___ and oxygen gas has the chemical formula ______.

Which of these are branched tubes found inside the lungs?

Match the following