Question

Which of the following is not a part of the human respiratory system
(a). Lungs
(b). Oesophagus
(c). Trachea
(d). Diaphragm​

Answer 1

oesophagus..

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Answer 2

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Which of the following is not a part of the human respiratory system

(a). Lungs

(b). Oesophagus (X)

(c). Trachea

(d). Diaphragm

(b.) Oesophagus is not a part of the human respiratory system.