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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...

Difference between histology of stomach and jejunum: lecture note

Difference between histology of stomach and jejunum Difference between histology of stomach and jejunum   Topic Histology of stomach Histology of jejunum   Histological layer  from within outward Mucosa Submucosa Muscularis externa Serosa (most of the part) Mucosa Submucosa Muscularis externa   serosa (intraperitoneal organ)   Lining epithelium Simple columnar epithelium Simple columnar epithelium with small number of goblet cells   Lamina propria Contain gastric gland Contain intestinal gland Muscularis mucosa Thin Thin Submucosa Contain no gland Contain no   gland Muscularis externa Smooth muscle cells are arranged in three layers Inner oblique Middle circular Outer longitudinal ...

Difference between histology of stomach and duodenum : lecture note

Difference between histology of stomach and duodenum  Topic Histology of stomach Histology of esophagus Histological layer from within outward Mucosa Submucosa Muscularis externa Serosa (most of the part) Mucosa Submucosa Muscularis externa Adventitia (most of the part) Lining epithelium Simple columnar epithelium Non-keratinized stratified squamous epithelium   Villi Absent Present Lamina propria Contain gastric gland Contain esophageal gland Muscularis mucosa Thin Usually thick Submucosa Contain no gland Contain gland Muscularis externa Smooth muscle cells are arranged in three layers Inner oblique Middle circular Outer longitudinal Upper 1/3 contain skeletal m...