Jone's Respiratory Mechanics (Mayson's set)

Compliant

Elastic

Lazy

Stretchy

inward

Outward

Down

Up

The full amount of air your lungs can hold

The air in the lungs after an exhale

About 2.5L

The air in the lungs after a full inhalation

About 2.5L

The air in the lungs at rest.

About 2.5L

Transpulmonary pressure

Atmospheric pressure

Intrapleural pressure

Alveolar Pressure

$$P_{atm\ }>P_{alv}$$

$$P_{atm}<P_{alv}$$

$$P_{atm}=P_{alv}$$

As the volume increases the pressure increases

$$\uparrow V\ \uparrow P\$$

As the Volume increases the pressure decreases

$$\uparrow V\ \downarrow P$$

As the volume decreases the pressure increases

$$\downarrow V\ \uparrow P$$

$$P1V1=\ P2V2$$

Air will move into the lungs

Air will move out of the lungs

There will be no net movement

Air will move out of the lungs

Air will move into the lungs

No net movement of the air

The chest expands and the $$P_{ip}$$ becomes more negative.

Volume in alveoli increases

And their pressure decreases

Air flows into the alveoli and fills the lungs

The pressure in the alveoli increases and the volume decreases.

Compress chest and $$P_{ip}$$ becomes less negative

Expand the chest and $$P_{ip}$$ becomes more negative

Pressure in alveoli increases and the volume decreases.

Air flows out

Air flows in