题目内容
_________ causes an increase in the oxygen level and a decrease in the carbon dioxide level of the blood, a condition called hypocapnia(低碳酸血症).
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_________is an infectious disease caused by the bacillus(芽孢菌属的) Mycobacterium_________ (结核分枝杆菌).
Respiration is centrally regulated by the
The _________of the lung is the midline region where blood vessels, nerves, and bronchial tubes enter and exit the organ.
_________ are hollow, air-containing spaces within the skull that communicate with the nasal cavity.
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