Procedure:
1. Look at the picture below Let the branch of grapes represent the breathing system.
2. Locate the parts of the breathing system the main stem as the trachea, the large
branching stems as the bronchi, and all the little stars as the bronchioles. The
individual grapes are the airsacs or alveoli
3. Trace the pathway of oxygen using the Bunch of Grapes" model. Note that alt
moves from the nose (nasal cavity) and mouth (oral cavity) to the trachea, bronchi
bronchioles, and then into the alveol (ansacs). The ait we breathe carries the gas
oxygon. When we breathe, the oxygen goes to the lungs.
For The bunch of grapes model of the breating system​