RESPIRATORY SYSTEM REVIEW

The main function of the respiratory system is exchange of- O--------------and---C------ d--

Oxygen enters the respiratory system through the-------m-------and---------n

The bronchial tubes lead into the ----------L------where they form very smaller tubes called-------b----

The air moves through the---------t---------to the------------------

Each bronchus forms smaller tubes called ------------------b---- --------t----------

The tiny air sacs that are formed at the tips or end of the bronchioles are called---------a-----------

Gas exchange of ----------o------------and------------c ---------d--------occurs in this place

Which part pushes carbon dioxide out of the lungs and pulls in oxygen into the lungs when it contracts or relaxes?

The trachea forms two small tubes called-------------b------------

Complete the sentence: The higher the height or elevation, or the higher you go, the-----------the amount of oxygen.

• more

• less

• zero

• none of the above