How does change in pulmonary blood pressure and capillary filtration cause wet breath sounds

The wet breath sound or the rales are the abnormal sound produced by the lungs which produce a sound like the crumpled phone or the rattling sounds.

The sound is heard when the person inhales the air and occur when the closed spaces in the lungs are opened by the air.  

In the given question when the increased blood pressure in the vessels forces the fluid to enter the lung and fills spaces then the blocked air spaces during inhalation are opened by the air. This produces the sound called wet rales or wet breath sounds.

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