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Showing posts from November, 2019

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 cervical and lumbar enlargement of spinal cord

Difference between cervical and lumbar enlargement of spinal cord Topic Cervical enlargement Lumbar enlargement Extent From C5 to T1 spinal segments From L2 to S3 spinal segments Vertebral level From C3 to T1 vertebra From T9 to L1 vertebrae Wider circumference About 38mm at the level of C6 segment About 35mm at the level of S1 segments Innervation Muscles of upper limbs and their associated girdles Muscles of the lower limb and their associated girdles

Difference between vasculogenesis and angiogenesis

Video link https://youtu.be/xLvbOVmVbG4