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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Microscopic difference between small and large intestine

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Difference between small and large intestine:
 Microscopic difference or gross difference

Features
small intestine
large intestine
Gland
intestinal gland in mucosa and Brunner’s gland at submucosa (only in duodenum)
intestinal gland in mucosa
plica circularis (fold of mucosa and submucosa)
present
absent
villi (projection of mucosa )
present
absent   
Peyer’s patches  

present
epiploiec appandages (aggregated lymphoid follicles)
present
absent  
Taeniae coli (longitudinally arranged smooth muscle cells , thicken in three location  
absent
present
Microvilli
present
absent
Lining epithelium
simple columnar epithelium with occasional goblet cells, panath cells, enteroendocrine cells,microfold (M cell) ,cup cell,Tuft cell  
simple columnar epithelium with large number of  goblet cells
Lacteal (lymphatic capillary) in lamina propria
present
absent

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