Difference between revisions of "Diaphragm - Anatomy & Physiology"

Revision as of 13:35, 13 August 2008

()Map CARDIORESPIRATORY SYSTEM (Map)

Dog Thorax, contents of Thoracic Cavity removed. ©Nottingham 2008

Introduction

The Diaphragm is a dome-shaped musculotendinous sheet separating the thoracic and abdominal cavities. It is convex on it's cranial surface. The Muscular part is peripheral, the Tendinous part is central. The muscular part has sections which arise from the Xiphoid Process of the Sternum, the Vertebral Column and the caudal Ribs.

Structure

Function

Vasculature

Innervation

Lymphatics

Histology

Species Differences

Links

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-{{OpenPagesTop}}
+{{toplink
-[[Image:DogThorax.jpg|right|thumb|250px|''Dog Thorax, contents of Thoracic Cavity removed. ©University of Nottingham 2008'']]
+|backcolour = FAFAD2
+|linkpage =Cardiorespiratory System - Anatomy & Physiology
+|linktext =Cardiorespiratory System
+|maplink = Cardiorespiratory (Content Map) - Anatomy & Physiology
+|pagetype =Anatomy
+}}
+<br>
+[[Image:DogThorax.jpg|right|thumb|350px|''Dog Thorax, contents of Thoracic Cavity removed. ©Nottingham 2008'']]
 ==Introduction==
-The Diaphragm is a dome-shaped musculotendinous sheet separating the thoracic and abdominal cavities. It is convex on its cranial surface. In the neutral position between full [[Anatomy and Physiology#Inspiration|inspiration]] and full [[Anatomy and Physiology#Expiration|expiration]], the most cranial part of the diaphragm is in line with the 6th rib.
+The Diaphragm is a dome-shaped musculotendinous sheet separating the thoracic and abdominal cavities. It is convex on it's cranial surface.
+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]].
 ==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]] and caudal [[Ribs and Sternum - Anatomy & Physiology|ribs]].
+*
+**
+***
-==Openings within the diaphragm==
+==Function==
-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 tendinous 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==
+==Vasculature==
-During [[Anatomy and Physiology#Inspiration|inspiration]], the diaphragm contracts to increase the volume of the thoracic cavity, decreasing its pressure, thus drawing air in. The diaphragm relaxes for [[Anatomy and Physiology#Expiration|expiration]].
+*
 ==Innervation==
-[[Image:PhrenicNerveDog.jpg|right|thumb|250px|©RVC 2008]]
-The diaphragm is supplied by the '''phrenic nerve'''.
+*
-==Species differences==
+==Lymphatics==
-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]].
+*
-{{Template:Learning
+==Histology==
-|videos = [[Video: Lateral view of the feline thorax and abdomen potcast|Lateral view of the feline thorax and abdomen potcast]]<br>[[Video: A guide to the cardiorespiratory examination of small animals|A guide to the cardiorespiratory examination of small animals]]<br>[[Video: Female dog abdomen dissection|Female dog abdomen dissection]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection|Equine left-sided abdominal and thoracic topography dissection]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection 2|Equine left-sided abdominal and thoracic topography dissection 2]]
-}}
-==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}}
+==Species Differences==
-==Webinars==
+*
-<rss max="10" highlight="none">https://www.thewebinarvet.com/respiratory/webinars/feed</rss>
-[[Category:Musculoskeletal System - Anatomy & Physiology]][[Category:Respiratory System - Anatomy & Physiology]]
+==Links==
-[[Category:A&P Done]]