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 cardiac muscle

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Difference between skeletal muscle and cardiac muscle 

 Topics 
Skeletal
Cardiac
Shape and size 
long and cylindrical 
Short, cylindrical 
Location
 skeleton muscle (muscle attached with skeleton) 
Heart, SVC, IVC
Connective tissue components 
Epimysium (cover whole muscle) , 
perimysium (cover individual muscle bundle)  
Endomysium (cover individual muscle cell) 
Endomysium
Branching
Absent
Present

Striation

Present

Present


Nucleus
Multinucleated & Peripherally placed 
Single centerally placed 
Cell to cell junctions
None
Intercalated disks containing
  1. fasciae adherents
  2. macula adherens
  3. gap junctions
Special features
Well-developed sER and T- tubules

Intercalated disks
Functions
Voluntary
Involuntary

Regeneration
Limited
None

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