The Respiratory System

Air enters the body through the ___ .

• nose and mouth

• ears and navel

• eyes

It passes through the ___ on its way to the voice box.

• pharynx

• larynx

• bronchi

• lungs

The voice box is also called the ___.

• pharynx

• larynx

• bronchi

• lungs

The ___ are situated in the voice box or larynx.

• tonsils

• lungs

• vocal chords

• nostrils

Next the air passes through the windpipe or ___.

• bronchi

• lungs

• trachea

• bronchioles

From the windpipe or trachea the air passes into the right and left ___.

• vena cava

• sinus

• bronchi

• lungs

From the bronchi the air passes into smaller ducts called ___.

• bronchioles

• bronchitos

• bronchules

• bronchini

Once in the lungs, air enters tiny sacs called ___.

• baggies

• capillaries

• sackettes

• alveoli

From the alveoli, oxygen enters the blood stream through tiny vessels called ___.

• arterioles

• capillaries

• aqueducts

• villi