Respiratory system

Front

tiny sacs of lung tissue specialized for the movement of gases between air and blood.

Back

alveoli

Front

tiny, hairlike projections in the airway that move in a wavelike manner.

Back

cilia

Front

the windpipe; a passage through which air moves in the respiratory system.

Back

trachea

Front

The passages that direct air into the lungs.

Back

bronchi

Front

Which of the following statements is true?

• Your lungs can store several hours' worth of oxygen.
• Your body can't store oxygen at all.
• Your body stores oxygen in your bloodstream.
• Your body needs carbon dioxide to function properly.

Back

Your body can't store oxygen at all.

Front

What can you infer about the function of the ribcage?

Back

It protects the lungs.

Front

What word best describes the function of the trachea? Options: Pumping station, Entrance point, Muscle, Passageway

Back

Passageway

Front

Where does the transfer of oxygen into the bloodstream take place?

Back

In the alveoli

Front

The walls of the alveoli and capillaries are permeable. What does this mean?

Back

Substances can pass through them.

Front

What happens when your diaphragm relaxes and moves upward?

Back

Your lungs deflate and you breathe out.