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Showing posts from August, 2021

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 typical long bone , miniature long bone and modify long bone

Difference between typical long bone , miniature long bone and modify long bone Topics Typical long bone Miniature long bone Modify long bone Parts in adult Upper end , shaft and lower end Head , shaft and base Sternal end , shaft and acromial end Parts in growing bone (children ) Epiphysis, epiphyseal cartilage , diaphysis , epiphyseal cartilage , epiphysis Epiphysis , epiphyseal cartilage , diaphysis One medial epiphysis near the sterna end , epiphyseal cartilage , two diaphysis , epiphyseal cartilage,   one lateral epiphysis near the acromial end Epiphysis Two (upper and lower) or more than two One epiphysis for base of 1 st metacarpal and 1 st metatarsal , phalanges . One epiphysis for head of 2 nd to 5 th metacarpal and metatarsal bone   Two epiphysis : medial and lateral Location ...

Difference between typical long bone and miniature long bone

 Difference between typical long bone and miniature long bone Topics Typical long bone Miniature long bone Parts in adult Upper end , shaft and lower end Head , shaft and base Parts in growing bone (children ) Epiphysis, epiphyseal cartilage , diaphysis , epiphyseal cartilage , epiphysis Epiphysis , epiphyseal cartilage , diaphysis Epiphysis Two or more than two One epiphysis Location Vertical Vertical Ossification Intracartilaginous Intracartilaginous

Difference between sublingual , submandibular and parotid gland