Muscles of inspiration Flashcards
1
Q
What is the function of the diaphragm?
A
sheet of muscle that separates the thorastic cavity from the abdominal cavity
Only blood vessels and nerves can pass through
2
Q
Where are the external intercostal muscles
A
Sit between the ribs on the outside of the ribs
3
Q
What happens when diaphragm contracts?
A
phrenic nerve is stimulated- the diaphragm then contracts
Diaphragm flattens much more space in the cavity
4
Q
What happens when the external intercostal muscles pull up and out?
A
Ribs are pulled upwards and outwards- increase the size of the thorastic cavity and will pull the lungs with it
Air pressure in the lungs will drop- causes pulling in of air from the external atmosphere
