Flashcards in Level 3 Muscles Overview - Breathing Actions Deck (3)
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1
Internal Intercostals
Location:
In between each of the ribs
Action:
- draws the ribs downwards, decreasing the volume of the thoracic cavity when breathing out (expiration)
Origin:
Superior border of each rib
Insertion:
Inferior border of the rib above
2
External Intercostals
Location:
In between each of the ribs
Action:
- lifts the ribs upwards, increasing the volume of the thoracic cavity when breathing in (inspiration)
Origin:
Superior border of each rib
Insertion:
Inferior border of the rib above
3