Comparison between tract and nerve

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  Comparison between tract and nerve Nerve Nerve contain bundle of axons (nerve fibers) in the peripheral nervous system (PNS) that transmits signals between the central nervous system (CNS) and other parts of the body. It is the most important part of peripheral nervous system Location: Peripheral nervous system. Structure: Made of axons, connective tissue layers (endoneurium: axon is surrounded by it , perineurium: bundle of axons are surrounded by it, epineurium: whole nerve trunk is surrounded by it), and blood vessels. It gets myelination by Schwann cell   Function: Carries sensory signals to the CNS (afferent) from peripheral part of body or motor signals carry from from the CNS (efferent) to target organs like skeletal muscle, cardiac muscle, smooth muscle or glands Example: Sciatic nerve, median nerve, except optic nerve (though optic nerve is technically part of CNS in develop...
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Difference between greater omentum and lesser omentum

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Difference between greater omentum and lesser omentum
Greater omentum
Lesser omentum
The greater omentum is a large apron-like fold of  peritoneum that hangs down from the greater curvature of stomach. It extends from the greater curvature of the stomach, passing in front of the small intestines and doubles back to ascend to the transverse colon before reaching to the posterior abdominal wall
The lesser omentum (small omentum or gastrohepatic omentum) is the fold of  peritoneum that attached with lesser curvature of the stomach.
it extends from the liver to the lesser curvature of the stomach (hepatogastric ligament) and the first part of the duodenum (hepatoduodenal ligament).
It has four layers
It has two layers
It has three subdivision
  • Gastrophrenic ligament—extends to the underside of the left dome of the diaphragm
  • Gastrocolic ligament—extends to the transverse colon(occasionally on its own considered synonymous with "greater omentum"
  • Gastrosplenic ligament(or Gastrolienal) ligament)— extends to the spleen, overlying the kidney
 It has two subdivision
·         hepatogastric ligament: the portion connecting to the lesser curvature of the stomach
  • hepatoduodenal ligament : the portion connecting to the duodenum
Content
The right and left gastroepiploic arteries

 Content
The right and left gastric artery
Between the two layers of the lesser omentum, close to the right free margin, are the hepatic artery proper, the common bile duct, the portal vein, lymphatics, and the hepatic plexus of nerves
Development
Dorsal mesogastrium

Development
Ventral mesogastrium

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