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Intercostal Muscles Increasing Thorax Volume Pressure Stages Inspiration

Inspiration involves the contraction of external intercostal muscles and the diaphragm, lifting the ribs and flattening the diaphragm, increasing thoracic volume and decreasing pressure to allow air to enter.

A inspiração envolve a contração dos músculos intercostais externos e do diafragma, elevando as costelas e achatando o diafragma, aumentando o volume torácico e diminuindo a pressão para permitir a entrada de ar.

Front What are the stages for inspiration
Back Uses energy
External intercostal muscles contract
Internal intercostal muscles relax
Ribs pulled upwards and out increasing thorax volume
Diaphragm muscle contracts causing it to flatten increasing volume of the thorax
Increased volume=decreased pressure
Atmospheric pressure>pulmonary pressure so air is forced in.

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