The diagram below represents a section of the human respiratory system.

      

The diagram below represents a section of the human respiratory system.

lungs12541042019.png

(a) One can inhale through path A, or B. Giving reasons, state the more appropriate path.

(b) How is the part labbelled C adapted for its function?

(c) Explain the effect of regular tobacco smoking to the functioning on the organ labelled D

  

Answers


Martin
(a) Path A (Nose) has mucous lining which trap foreign particles in air; has sensitive cells to smell in nose limit inhalation of poisonous gases; air is warmed in the nose before reading the lungs; hair in the nose filter solid particles in the air;

(b) Has a lumen/tubular for air passage; has mucous membrane to trap foreign particles and filter dust; Has cartilage to prevent collapsing / to keep it open; Has elastic muscles to allow compression and flexibility;

(c) Soot/smoke particles block the passage (bronchi/alveoli) of the gases; may cause cancer /stimulate the epithelium membrane/lining to secrete a lot of mucus which may block the passage;
marto answered the question on October 4, 2019 at 10:56


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