Bronchioles have a diameter of about __ One centimeter Five centimeters Five millimeters One millimeter

## Step 1<br />The bronchioles are part of the respiratory system and are smaller than the bronchi. They are responsible for carrying air from the bronchi to the alveoli, where gas exchange occurs.<br />## Step 2<br />The diameter of bronchioles is typically around one millimeter. This is smaller than the diameter of the bronchi, which is around one centimeter.<br />## Step 3<br />The diameter of bronchioles is also smaller than five centimeters or five millimeters. Therefore, the correct answer is one millimeter.