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Antennal glands or green glands are the respiratory organs of

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Important Questions on Breathing and Exchange of Gases

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The respiratory organs of scorpion are (i); among vertebrates, fish use (ii); whereas reptiles, birds and mammals use (iii). Fill in the blanks with correct options.
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Which of the following part of the respiratory tract does not have cartilaginous rings on its walls?
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All of the following form the conducting part of the respiratory tract, except:-
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Which of the following is the correct passage of air from outside into lungs?
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Read the following statements. Which of the following is correct?
(i) Lungs are covered with a two-layered membrane called pleura.
(ii) Right primary bronchus divides into two secondary bronchi.
(iii) Respiratory bronchioles, alveolar ducts and alveoli constitute the exchange part of the respiratory tract.
(iv) The left lung has three lobes, while the right lung has two.