Deep Muscles of the Thorax - Used for breathing

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Last updated 12:51 AM on 10/10/26
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9 Terms

1
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External Intercostals

A: Elevates Rib cage during quite and deep inhalation

2
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External Intercostals

O: Rib — superior

3
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External Intercostals

I: Rib — inferior

4
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Internal Intercostals

A: Draw ribs together (depresses rib cage) in deep (forced) exhalation

5
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Internal Intercostals

O: Rib — inferior

6
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Internal Intercostals

I: Rib — superior

7
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Diaphragm

A: Increases volume of thoracic cavity for quiet and deep inhalation, Increases intra-abdominal pressure (for micturition, parturition, defecation, emesis)

8
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Diaphragm

O: Xiphoid process of sternum, Costal cartilage (of ribs 7-10), Lumbar Vertebrae

9
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Diaphragm

I: Central Tendon