Changes

===Development===

===Development===

In the early embryo, the primitive gut tube is suspended by the dorsal and ventral mesogastria. The mesogastria divide the embryo into two cavities, called the left and right coelomic cavities. The ventral mesogastrium atrophies caudal to the pylorus of the [[Forestomach - Anatomy & Physiology|stomach]] and cranial to the [[Rectum - Anatomy & Physiology|rectum]]. This gives the entire [[Small Intestine - Anatomy & Physiology|small intestine]] and most of the [[Large Intestine - Anatomy & Physiology|large intestine]] large scope for expansion and rotation. It also allows the left and right coelomic cavities to coalesce. This forms one cavity; '''the peritoneal cavity'''.

In the early embryo, the primitive gut tube is suspended by the dorsal and ventral mesogastria. The mesogastria divide the embryo into two cavities, called the left and right coelomic cavities. The ventral mesogastrium atrophies caudal to the pylorus of the [[Monogastric Stomach - Anatomy & Physiology|stomach]] and cranial to the [[Rectum - Anatomy & Physiology|rectum]]. This gives the entire [[Small Intestine - Anatomy & Physiology|small intestine]] and most of the [[Large Intestine - Anatomy & Physiology|large intestine]] large scope for expansion and rotation. It also allows the left and right coelomic cavities to coalesce. This forms one cavity; '''the peritoneal cavity'''.

Peritoneal structures develop from the dorsal and ventral mesogastria.

Peritoneal structures develop from the dorsal and ventral mesogastria.

The peritoneum doubles up to form the following suspensory structures:

The peritoneum doubles up to form the following suspensory structures:

*Mesentery: from viscera to the dorsal abdominal wall.

*Mesentery: from viscera to the dorsal abdominal wall.

*Omentum: from the [[Forestomach - Anatomy & Physiology|stomach]] to other viscera.

*Omentum: from the [[Monogastric Stomach - Anatomy & Physiology|stomach]] to other viscera.

*Ligament: from viscera not involved in digestion to the abdominal wall ''or'' to other viscera that are not involved in digestion (e.g.ligaments of the [[Liver - Anatomy & Physiology|liver]]).

*Ligament: from viscera not involved in digestion to the abdominal wall ''or'' to other viscera that are not involved in digestion (e.g.ligaments of the [[Liver - Anatomy & Physiology|liver]]).

===Omenta===

===Omenta===

*During development in the region of the [[Forestomach - Anatomy & Physiology|stomach]], a fold of the dorsal mesogastrium becomes extended into a curtain - like structure called the '''greater omentum'''.

*During development in the region of the [[Monogastric Stomach - Anatomy & Physiology|stomach]], a fold of the dorsal mesogastrium becomes extended into a curtain - like structure called the '''greater omentum'''.

**Originates from the greater curvature of the [[Forestomach - Anatomy & Physiology|stomach]] and attaches to the proximal part of the [[Duodenum - Anatomy & Physiology|duodenum]].

**Originates from the greater curvature of the [[Monogastric Stomach - Anatomy & Physiology|stomach]] and attaches to the proximal part of the [[Duodenum - Anatomy & Physiology|duodenum]].

**Potential space between the two sheets is called the omental bursa.

**Potential space between the two sheets is called the omental bursa.

**Covers the [[Jejunum - Anatomy & Physiology|jejunal mass]] on the ventral abdominal wall.

**Covers the [[Jejunum - Anatomy & Physiology|jejunal mass]] on the ventral abdominal wall.

**Opening to the omental bursa is called the epiploic foramen.

**Opening to the omental bursa is called the epiploic foramen.

*The '''lesser omentum''' runs from the lesser curvature of the [[Forestomach - Anatomy & Physiology|stomach]] to the [[Liver - Anatomy & Physiology|liver]].

*The '''lesser omentum''' runs from the lesser curvature of the [[Monogastric Stomach - Anatomy & Physiology|stomach]] to the [[Liver - Anatomy & Physiology|liver]].

===Ligaments===

===Ligaments===

*'''Gastrophrenic Ligament''' - from the greater curvature of the [[Forestomach - Anatomy & Physiology|stomach]] to the crura of the diaphragm.

*'''Gastrophrenic Ligament''' - from the greater curvature of the [[Monogastric Stomach - Anatomy & Physiology|stomach]] to the crura of the diaphragm.

*'''Gastrosplenic Ligament''' - part of the greater omentum. Connects the [[Spleen - Anatomy & Physiology|spleen]] to the [[Forestomach - Anatomy & Physiology|stomach]].

*'''Gastrosplenic Ligament''' - part of the greater omentum. Connects the [[Spleen - Anatomy & Physiology|spleen]] to the [[Monogastric Stomach - Anatomy & Physiology|stomach]].

*'''Hepatoduodenal Ligament''' - remnant of the ventral mesogastrium. From the cranial part of the [[Duodenum - Anatomy & Physiology|duodenum]] to the [[Liver - Anatomy & Physiology|liver]]. The bile duct runs within it.

*'''Hepatoduodenal Ligament''' - remnant of the ventral mesogastrium. From the cranial part of the [[Duodenum - Anatomy & Physiology|duodenum]] to the [[Liver - Anatomy & Physiology|liver]]. The bile duct runs within it.

*'''Nephrosplenic Ligament''' (renosplenic ligament) - In the horse - from [[Spleen - Anatomy & Physiology|spleen]] to [[Urinary System - Anatomy & Physiology#Upper Urinary Tract|left kidney]].

*'''Nephrosplenic Ligament''' (renosplenic ligament) - In the horse - from [[Spleen - Anatomy & Physiology|spleen]] to [[Urinary System - Anatomy & Physiology#Upper Urinary Tract|left kidney]].

*Organs are intraperitoneal if they are enclosed by a fold of visceral peritoneum.

*Organs are intraperitoneal if they are enclosed by a fold of visceral peritoneum.

*Intraperitoneal organs include:

*Intraperitoneal organs include:

**[[Forestomach - Anatomy & Physiology|Stomach]]

**[[Monogastric Stomach - Anatomy & Physiology|Stomach]]

**[[Small Intestine - Anatomy & Physiology|Small Intestine]]

**[[Small Intestine - Anatomy & Physiology|Small Intestine]]

**[[Large Intestine - Anatomy & Physiology|Large Intestine]]

**[[Large Intestine - Anatomy & Physiology|Large Intestine]]