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Pancreas - Anatomy & Physiology (view source)
Revision as of 11:41, 24 July 2008
, 11:41, 24 July 2008→Development
===Development===
===Development===
The pancreas develops from endoderm, except for the connective tissue which develops from splanchnic mesoderm. Development begins with evaginations of the digestive tube caudal to the [[Forestomach - Anatomy & Physiology|stomach]]. Two pancreatic buds form, one in the dorsal mesogastrium and one in the ventral mesogastrium. Some epithelial cells lose their connections to the developing duct system of the exocrine pancreas and develop into the islets of Langerhans of the endocrine pancreas. As the [[Forestomach - Anatomy & Physiology|stomach]] rotates, the ventral bud moves to become more dorsal. The two buds then fuse; the left lobe is derived from the dorsal bud and the right lobe from the ventral bud. The duct of the ventral lobe ('''pancreatic duct''') joins with the bile duct to form the '''common bile duct''' which opens into the duodenum at the '''major duodenal papilla'''. The duct of the dorsal lobe ('''accessory duct''') enters the duodenum at the '''minor duodenal papilla'''. There is [[#Species Differences|species variation]] in the persistance of each duct.
The pancreas develops from endoderm, except for the connective tissue which develops from splanchnic mesoderm. Development begins with evaginations of the digestive tube caudal to the [[Forestomach - Anatomy & Physiology|stomach]]. Two pancreatic buds form, one in the dorsal mesogastrium and one in the ventral mesogastrium. Some epithelial cells lose their connections to the developing duct system of the exocrine pancreas and develop into the islets of Langerhans of the endocrine pancreas. As the [[Forestomach - Anatomy & Physiology|stomach]] rotates, the ventral bud moves to become more dorsal. The two buds then fuse; the left lobe is derived from the dorsal bud and the right lobe from the ventral bud. The duct of the ventral lobe ('''pancreatic duct''') joins with the bile duct to form the '''common bile duct''' which opens into the duodenum at the '''major duodenal papilla'''. The duct of the dorsal lobe ('''accessory duct''') enters the [[Duodenum - Anatomy & Physiology|duodenum]] at the '''minor duodenal papilla'''. There is [[#Species Differences|species variation]] in the persistance of each duct.
==Structure==
==Structure==