Question

Describe the process of inspiration linking the action of muscles to the movement of strucrtures, change in pressure within the lungs and direction of airflow.

Accepted Answer

Inspiration:Diaphragm contracts - flattens and lowersExternal intercostal muscles contract, moving ribs upwards and outwardsVolume of thorax increases so pressure in thorax is reducedLower pressure in thorax than atmospheric pressure - air drawn thru nasal passages, trachea, bronchi and bronchioles into the lungs until atmohperic and thoracic pressure equalise

Front	Describe the process of inspiration linking the action of muscles to the movement of strucrtures, change in pressure within the lungs and direction of airflow.
Back	Inspiration: Diaphragm contracts - flattens and lowers External intercostal muscles contract, moving ribs upwards and outwards Volume of thorax increases so pressure in thorax is reduced Lower pressure in thorax than atmospheric pressure - air drawn thru nasal passages, trachea, bronchi and bronchioles into the lungs until atmohperic and thoracic pressure equalise

Pressure Thorax Muscles Lungs Describe Process Inspiration Linking