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 cardiac muscle and smooth muscle

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Topics
Cardiac
Smooth
Muscle cell
Short, narrow cell
Short, elongate, fusiform cell
Location
Heart, SVC,IVC
Vessels, organs
Connective tissue components
Endomysium
Endomysium
Branching
Present
Absent
Striation
Present
Absent
Nucleus
Single center
Single centerally placed 
Cell to cell junctions
Intercalated disks containing
  1. fasciae adherents
  2. macula adherens
  3. gap junctions
Gap junctions
Special features
Intercalated disks
Dense body
Functions
Involuntary
Involuntary
Regeneration
None
Present

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