Explain and write the functions of human respiratory system
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functions:
Explanation:
the respiration involves oxygen gas it occurs in mammals like humans dog cats etc. in respiration the air is enters from nasal passage where fine hairs present to filter air the air enters into lungs . the lungs are terminated into bronchi and bronchioles. they further form sac like structure known as alveoli .in alveoli the exchange of gases takes place .
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