Which of the following statements is true reg | vedclass

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(A) The trachea is a straight tube extending up to the mid-thoracic cavity. It is supported by '$C$'-shaped rings of hyaline cartilage,which prevent t

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Tracheal rings are of hyaline cartilage

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(A) The trachea is a straight tube extending up to the mid-thoracic cavity. It is supported by '$C$'-shaped rings of hyaline cartilage,which prevent the trachea from collapsing. Option '$A$' is correct because the tracheal rings are indeed composed of hyaline cartilage. Option '$B$' is incorrect because the dorsal side of the thoracic chamber is formed by the vertebral column,while the sternum forms the ventral side. Option '$C$' is incorrect because expiration occurs when the intra-pulmonary pressure is higher than the atmospheric pressure. Option '$D$' is incorrect because inspiration occurs when the intra-pulmonary pressure is less than the atmospheric pressure (negative pressure).

Which of the following statements is true regarding the human respiratory system?

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