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Comparison between tract and nerve

  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...

Difference between male and female skull

Difference between male and female skulls Topics Male skull Female skull Superciliary arches and Prominent Not prominent glabella Prominent Not prominent Mastoid process Very prominent Not prominent Nuchal lines Very prominent Not prominent Frontal & parietal tuberosity Less prominent More Prominent Angle of mandible Everted Inverted Wt More Less Wall thickness Thicker Thinner Vault of skull flattened rounded  Capacity  More  Less  Tympanic plate Larger and margins are rounded Smaller and margins are less rounded Temporal line More prominent Less prominent ...

Difference between sympathetic and parasympathetic nervous system

Topics Sympathetic nervous system Parasympathetic nervous system Out flow it is also known as thoraco lumbar outflow T1 to L 2 It is also known as cranio sacral outflow Following Cranial nerves are involve   3,7,9 & 10 Sacral : S2,3,4 Pre ganglionic fibres Short Longer Post ganglionic fibres Longer Shorter Ganglia Para vertebral sympathetic ganglia it is away from the target organ Small ganglia close to viscera Ex: ciliary ganglia Location of pre-ganglionic neuron •        Lateral horn cells of all thoracic segments and upper two or three lumbar segments of spinal cord •        Neurons are located in the brain stem and connected with the 3, 7, 9, 10 cranial nerves and 2,3,4 sacral segments of spinal cord Location o...