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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 T lymphocyte and B lymphocyte

Difference between T lymphocyte and B lymphocyte <script data-ad-client="ca-pub-3738618711723990" async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> topic  T lymphocyte B lymphocyte Origin Bone marrow Bone marrow Mature Thymus Bone marrow Location of mature cell Mature cell present within the lymph node Mature cell present out side the lymph node Receptors Bear TCR receptors Bear BCR receptor Viral antigens Recognized viral antigens on the outside of infected cells    Recognized   antigens on the surface of bacteria and viruses Life span                 Long Short Type of immunity Cell mediated immunity Humoral or Antibodies...