The volume of oxygen in every 1000 ml. of inspired air is :
Answers
Answer:
The volume of oxygen in every 1000 ml. of inspired air is 210 ml
Explanation:
The largest conducting tube in the airway, the trachea, receives inspired air exiting the larynx in the form of a jet. The trachea, which is the most distal tube in the tracheobronchial tree and generation zero in the Weibel "A" model, has a diameter of about 1.8 cm and measures about 12 cm from the distal edge of the larynx to the carina in adults. The main cell types lining the tracheal lumen are goblet cells and columnar ciliated epithelium. Significant radial pressure gradients can result from negative pressures inside the tracheal lumen during laboured inspiration, which might theoretically cause the trachea to collapse. A series of incomplete cartilaginous rings maintained by fibroelastic and smooth muscle tissues spreading along the length of the trachea ensure the patency of the trachea during vigorous breathing.
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