Question

how to prepare lung modle and explain
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Answer 1

refer google instead of waiting for our answers, follow this advice it will be useful.

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Answer 2

material you need are

1.a 2ltr bottle

2.3 balloon

3.3straw

cut the bottle from top and take a balloon and cut it and stick it to the cutted portion with tape then take 1 straw and at the bottom make two small circle and put the other two straw into it and stick it then attach the two balloon on the two straw and the straw into which the two straw are attached stick it into the bottle cap by making a hole into it