Comparison between tract and nerve

-
  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...
Post a Comment

Difference between greater omentum and lesser omentum

-

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

Popular posts from this blog

Difference between lumbar and sacral splanchnic nerve

-
Difference between lumbar and sacral splanchnic nerve Name Location of preganglionic neuron Sympathetic ganglion Collateral Ganglion Form Autonomic   Plexus Fibres Functions Lumbar splanchnic nerve Lateral horn of gray matter of Lumbar 1,2 spinal cord segment Lumbar 1,2 Inferior mesenteric ganglion Superior hypogastric plexus Preganglionic Sympathetic Fibres and General visceral afferent fiber Innervate pelvic viscera and vasculature Sacral splanchnic nerve Lateral horn of gray matter of Lumbar 1,2 spinal cord segment Sacral 1-5 Inferior mesenteric ganglion Inferior hypogastric plexus Preganglionic and postganglionic fibres Sympathetic Fibres and General visceral afferent fiber The inferior hypogastric plexus is a plexus of nerves that suppli...
Read more

Difference between greater and lesser splanchnic nerve

-
Difference between greater and lesser splanchnic nerve  Name Location of preganglionic neuron Sympathetic ganglion Collateral Ganglion Form autonomic Plexus Functions Greater splanchnic nerve Lateral horn of gray matter of Thoracic 5-9 spinal cord segment Thoracic 5-9 Synapse with celiac ganglion Celiac plexus   The fibers in this nerve modulate the activity   of the enteric nervous system of the foregut. They also provide the sympathetic innervation to the adrenal medulla, stimulating catecholamine release. Lesser splanchnic nerve Lateral horn of gray matter of Thoracic 10-11 spinal cord segment Thoracic   10-11 Synapse with   aortico-renal ganglion or superior mesenteric ganglion Renal plexus The nerve modulates the activity of the enteric nervous system of the midgut
Read more

Difference between anterior and posterior part of rectus sheath Topics Anterior part of rectus sheath Posterior part of rectus sheath Above costal margin This part of rectus sheath is only formed by single aponeurosis. The aponeurosis of External oblique abdominis No rectus sheath Related with costal cartilage From costal margin to arcuate line This part of rectus sheath is formed by two aponeurosis. The aponeurosis of External oblique abdominis and anterior layer of aponeurosis of internal oblique abdominis This part of rectus sheath is formed by two aponeurosis. The aponeurosis of External oblique abdominis and posterior layer of aponeurosis of internal oblique abdominis Below the arcuate line (this line is situated midway between umbilicus and upper surface of pubis symphysis ) This part of rectus sheath is formed by three aponeurosis. The aponeurosis of External oblique abdominis, internal oblique abdominis and transverses abdominis No rectus sheath Related with fascia transversalis

-
Difference between anterior and posterior part of rectus sheath Topics Anterior part of rectus sheath Posterior part of rectus sheath Above costal margin This part of rectus sheath is only formed by single aponeurosis. The aponeurosis of External oblique abdominis  No rectus sheath Related with costal cartilage From costal margin to arcuate line This part of rectus sheath is  formed  by two  aponeurosis. The aponeurosis of External oblique abdominis  and anterior layer of aponeurosis of internal oblique abdominis This part of rectus sheath is  formed  by two  aponeurosis. The aponeurosis of External oblique abdominis  and posterior layer of aponeurosis of internal oblique abdominis Below the arcuate line (this line is situated midway between umbilicus and upper surface of pubis symphysis )  This part of rectus sheath is formed by th...
Read more