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 ependymocytes, tanycytes & choroidal epithelial cells

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Difference between ependymocytes, tanycytes & choroidal epithelial cells
Topic
Ependymocytes
Tanycytes
Choroidal epithelial cells
Structure
Cuboidal or columnar in shape with cilia and microvilli, gap junctions
Long basal processes with end feet on capillaries
Sides and bases thrown into folds tight junctions
Location
Line ventricles, central canal
Line floor of third ventricle
Cover surfaces of choroid plexuses
Function
Circulation CSF
Absorb CSF
Transport substances from CSF to hypophyseal portal system
Produce and secrete CSF

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