click below
click below
Normal Size Small Size show me how
Muscle Group 8
Muscles That Aid in Breathing
Question | Answer |
---|---|
External intercostals | Origin: Inferior border of rib above Insertion: Superior border of rib below Action: Pulls ribs towards one another to elevate rib cage; Aid in inspiration (synergist to diaphragm) |
Internal intercostals | Origin: Superior border of rib below Insertion: Inferior border of rib above Action: Draws ribs together to depress rib cage |
Diaphragm | Origin: Inferior border of rib cage & sternum; Margins of thoracic cage Insertion: Central tendon of diaphragm Action: Contract to cause inspiration |