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 skeletal muscle and smooth muscle

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Difference between skeletal muscle and smooth muscle 

Topics
Skeletal
Smooth
Muscle cell
Large, elongate cell
Short, elongate, fusiform cell
Location
Muscles of skeleton
Vessels, organs
Connective tissue components
Epimysium, perimysium Endomysium
Endomysium
Branching
Absent
Absent
Striation
Present
Absent
Nucleus
Multinucleated & Peripherally placed 
Single centerally placed 
Cell to cell junctions
None
Gap junctions
Special features
Well-developed sER and T- tubules
Dense body
Functions
Voluntary
Involuntary
Regeneration
Limited
Present

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