Question

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Answer 1

Answer:

trachea, lungs, alveoli and diaphragm

Explanation:

Answer 2

a) The whole system is known as respiratory system. The name of the labeled parts are:
1.trachea
2.lungs
3.diaphragm
4.alveoli

b)The diaphragm is in relaxing position.
when a person inhales the diaphragm contracts and shrinks, after when the person exhales diaphragm relaxes

c) 1.Cilia propel a liquid layer of mucus that covers the airways. The mucus layer traps infectious microorganisms and other particles, preventing them from reaching the lungs.
2. Lungs are also protected by ribcage, which is made up of 12 sets of rib.


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