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Diaphragm - Anatomy & Physiology (view source)
Revision as of 13:55, 13 August 2008
, 13:55, 13 August 2008no edit summary
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The Muscular part is peripheral, the Tendinous part is central. The muscular part has sections which arise from the Xiphoid Process of the [[Ribs and Sternum - Anatomy & Physiology|Sternum]], the [[Spinal Column - Anatomy & Physiology|Vertebral Column]] and the caudal [[Ribs and Sternum - Anatomy & Physiology|Ribs]].+
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+*+
−==Lymphatics==
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−*
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−==Histology==
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−*
The Diaphragm is a dome-shaped musculotendinous sheet separating the thoracic and abdominal cavities. It is convex on it's cranial surface.
The Diaphragm is a dome-shaped musculotendinous sheet separating the thoracic and abdominal cavities. It is convex on it's cranial surface.
−In the neutral position between full [[Anatomy & Physiology#Inspiration|inspiration]] and full [[Anatomy & Physiology#Expiration|expiration]], the most cranial part of the Diaphragm is in line with the 6th Rib.
+==Structure==
==Structure==
+
+*The Muscular part of the diaphragm is peripheral, surrounding the central Tendinous area.
+*The muscular part has sections which arise from the
+**Xiphoid Process of the [[Ribs and Sternum - Anatomy & Physiology|Sternum]]
+**[[Spinal Column - Anatomy & Physiology|Vertebral Column]]
+**Caudal [[Ribs and Sternum - Anatomy & Physiology|Ribs]].
*
*
−**
+***
+==Openings within the Diaphragm==
+*The Diaphragm has three openings:
+**'''Aortic Hiatus''' - the most Dorsal opening, contains the Aorta, Azygous Vein and Thoracic Duct.
+**'''Oesophageal Hiatus''' - contains the oesophagus, dorsal and ventral Vagal trunks.
+**'''Caval Foramen''' - lies within the central tendoninous region of the diaphragm, and contains the Caudal Vena Cava. This opening does not allow movement;the diaphragm is fused with the vessel wall.
==Function==
==Function==
−During [[Anatomy & Physiology#Inspiration|Inspiration]], the diaphragm contracts to increase the volume of the thoracic cavity, decreasing it's pressure, thus drawing air in.
+The Diaphragm relaxes for [[Anatomy & Physiology#Expiration|Expiration]].
==Vasculature==
==Vasculature==
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==Innervation==
==Innervation==
−*
+* The Diaphragm is supplied by the Phrenic Nerve.
−==Species Differences==
==Species Differences==
−*
+*Because of the shorter thorax, the diaphragm is steeper in the '''ruminant''' compared to the '''horse'''.
+*'''Avian''' species do not possess a diaphragm. Air moves in and out of their lungs via [[Avian Respiration - Anatomy & Physiology#Air Sacs|Air Sacs]].
==Links==
==Links==
+==References==
+
+*{{citation|initiallast = Dyce|initialfirst = K.M|2last = Sack|2first = W.O|finallast = Wensing|finalfirst = C.J.G|year = 2002|title = Textbook of Veterinary Anatomy|ed =3rd|city = Philadelphia|pub = Saunders}}