If there is a puncture in the thoracic cavity | vedclass

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Question

(D) The thoracic cavity is a closed,airtight chamber. The lungs are kept inflated by the negative intrapleural pressure (pressure lower than atmospher

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The breathing rate increases.

Vedclass · Answer

(D) The thoracic cavity is a closed,airtight chamber. The lungs are kept inflated by the negative intrapleural pressure (pressure lower than atmospheric pressure) within the pleural cavity. If a puncture occurs in the thoracic wall (thoracic cavity) without damaging the lungs,air enters the pleural space from the outside. This leads to the loss of the negative pressure,causing the lungs to collapse (a condition known as pneumothorax). As the lungs collapse,the body attempts to compensate for the reduced gas exchange by increasing the breathing rate to maintain oxygen levels. Therefore,the breathing rate increases.

If there is a puncture in the thoracic cavity but not in the lungs,then...

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