Name:___________________________________ Yr. & Se.:_____________ Score:_______

Teacher:_________________________________ Date:_____________________________

Activity 1

What a Bunch of Grapes!

PART A

Objective:

breathing system.

2. Within your group, locate the parts of the breathing system: the main stem as

the trachea, the large branching stems as the bronchi, and all the little stems

as the bronchioles. The individual grapes are the airsacs or alveoli.

3. One by one, gently take out some of the grapes to expose more of the

branching stems (bronchioles). Observe its structure.

4. Trace the pathway of oxygen using the “Bunch of Grapes” model. Note that

air moves from the nose (nasal cavity) and mouth (oral cavity) to the

trachea, bronchi, bronchioles, and then into the alveoli (air sacs). The air

we breathe carries the gas oxygen. When we breathe, the oxygen goes to