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 shapes of the proximal surfaces of the base of the 1st , 2nd , 3rd , 4th and 5th metatarsal bones and their articulation

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Difference between shapes of the proximal surfaces of the base of 
the  1st , 2nd , 3rd , 4th and 5th metatarsal bones and their articulation 
                                                                           1st metatarsal 
                                                                        2nd metatarsal


3rd metatarsal 

Metatarsal
Shape of the articular surface
Articulates with
1st
Kidney shaped
Medial cuneiform
2nd
Triangular
Intermediate cuneiform
3rd
Triangular
Lateral cuneiform
4th
Quadrangular
Cuboid
5th
Triangular
Cuboid

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