Changes

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]].

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==

==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 and '''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.

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 and '''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.

The Diaphragm is supplied by the '''phrenic nerve'''.

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]].

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]].

[[Category:Musculoskeletal System]][[Category:Respiratory System - Anatomy & Physiology]]

[[Category:Musculoskeletal System]][[Category:Respiratory System - Anatomy & Physiology]]

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