View source for Describing structure and function of lungs


=== Objectives: ===
To develop the skill of model making and describing.

=== Materials required: ===
2 Liter water bottle with cap, 2-3 straws, polythene cover, two balloons, scissors, thread, glue, knife.

=== Pre-requisites: ===
Meaning of inhalation and exhalation

=== Process: ===
Give students the following instructions:

* Take a 2 liter water bottle; cut 3/4<sup>th</sup> the bottle as shown in   the figure.
* Take a long straw, bend 1/4<sup>th</sup> of the straw, cut small portion   of the straw at the bent surface and attach a small piece of other   straw to the cut portion and stick it using a gum to make a Y-tube. 
* Tie two balloons to both the ends of the Y-tube using a thread.
* Make a hole in the cap of the bottle and insert a Y-tube with balloons   into it. Now, place it in the bottle by turning the cap
* Cover the bottom of the bottle using a transparent polythene cover.   (Note-Bottle should not be covered tightly).
* Model of lungs is now ready. Pull the transparent cover downwards you will   see the balloons inflating, when you release the cover you see the   balloons deflating.
* Describe the structure and function of the lungs using the model created.

=== '''Pedagogic   principles:''' ===
Describe a life process using the model created.

=== '''Assessment:''' ===
{| class="wikitable"
|Criterion
|5
|4
|3
|2
|1
|-
|Follow         

instruction         and

work         

independently
|Able         to follow

Instruction         and 

Work         

Independently

and         correctly
|Follows         

Instruction

needs         help 

occasionally
|Needs         help half

of         the time
|Struggles         to 

follow         

instruction         and

work
|Not         able to 

Follow

instruction         and 

work
|-
|Describes         the

structure         and 

function
|Describes

Independently

and         appropriately
|Describes         

correct         but

not

appropriate
|Describes

almost         correct
|Struggles         to 

describe         
|Not         able to 

decsribe
|}