Definitions

# Respiratory physiology

Respiratory physiology is the branch of human physiology focusing upon respiration.

Topics include:

## Mechanics

Breathing in, or inhaling, is usually an active movement. The contraction of the diaphragm muscles cause a pressure variation, which is equal to the pressures caused by elastic, resistive and inertial components of the respiratory system.

begin\left\{align\right\} P &= P_\left\{el\right\} + P_\left\{re\right\} + P_\left\{in\right\} P &= EV + Rdot\left\{V\right\} + Iddot\left\{V\right\} end\left\{align\right\}

Where Pel equals the product of elastance E (inverse of compliance) and volume of the system V, Pre equals the product of flow resistance R and time derivate of volume V (which is equivalent to the flow), Pin equals the product of inertance I and second time derivate of V. R and I are sometimes referred to as Rohrer's constants.

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