What pressure is the result of the natural tendency of the lungs to decrease their size (because of elasticity) and the opposing tendency of the thoracic wall to pull outward and enlarge the lungs?
intrapleural pressure

The pressure that results from the tendency of the lungs to decrease or shrink, while the chest wall seeks to enlarge them is called intrapleural pressure.

Explanation:

The process of pulmonary ventilation involves the existence of a set of opposite pressures that change depending on the phase of the breath in which they are.

The atmospheric pressure tends to be higher than the pulmonary pressure, which allows air to enter the lungs, while in exhalation there is an increase in pressure in the lungs that pushes the air out.

The loss of chest wall integrity, caused by an open wound, causes the lungs to close due to air entering the chest.

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Intrapleural pressure link

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explanation:

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave