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| **Expiratory muscles diminish the cavity and force air out | | **Expiratory muscles diminish the cavity and force air out |
| *The most important thoracic muscle is the '''''Diaphragm''''', which separates the thoracic and abdominal cavities | | *The most important thoracic muscle is the '''''Diaphragm''''', which separates the thoracic and abdominal cavities |
| + | [[Image: Cat diaphragm.jpg|thumb|right|150px|Cat diaphragm- Copyright Uwe Gille]] |
| + | *''Intercostal muscles'' |
| **Dome-shaped, convex on its cranial surface | | **Dome-shaped, convex on its cranial surface |
| **Central tendon forms the vertex | | **Central tendon forms the vertex |
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| ***'''Caval foramen''' withing central tendon conveying [[Liver - Anatomy & Physiology#Vasculature|caudal vena cava]] | | ***'''Caval foramen''' withing central tendon conveying [[Liver - Anatomy & Physiology#Vasculature|caudal vena cava]] |
| **Innervated by the '''phrenic nerve''', which arises from the caudal cervical nerves (C5-C7) | | **Innervated by the '''phrenic nerve''', which arises from the caudal cervical nerves (C5-C7) |
− | [[Image: Cat diaphragm.jpg|thumb|right|150px|Cat diaphragm- Copyright Uwe Gille]]
| + | |
− | *''Intercostal muscles''
| |
| **External fibers run caudoventrally and internal fibers run cranioventrally | | **External fibers run caudoventrally and internal fibers run cranioventrally |
| **Each is confined to a single intercostal space | | **Each is confined to a single intercostal space |