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  2. Nail (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Nail_(anatomy)

    A nail is a protective plate characteristically found at the tip of the digits ( fingers and toes) of all primates, corresponding to the claws in other tetrapod animals. Fingernails and toenails are made of a tough rigid protein called alpha-keratin, a polymer also found in the claws, hooves and horns of vertebrates.

  3. Nail disease - Wikipedia

    en.wikipedia.org/wiki/Nail_disease

    A nail disease or onychosis is a disease or deformity of the nail. Although the nail is a structure produced by the skin and is a skin appendage, nail diseases have a distinct classification as they have their own signs and symptoms which may relate to other medical conditions. Some nail conditions that show signs of infection or inflammation ...

  4. Cuticle - Wikipedia

    en.wikipedia.org/wiki/Cuticle

    Human anatomy Anatomy of the basic parts of a human nail. In human anatomy, "cuticle" can refer to several structures, but it is used in general parlance, and even by medical professionals, to refer to the thickened layer of skin surrounding fingernails and toenails (the eponychium), and to refer to the superficial layer of overlapping cells covering the hair shaft (cuticula pili), consisting ...

  5. Onychomycosis - Wikipedia

    en.wikipedia.org/wiki/Onychomycosis

    Onychomycosis, also known as tinea unguium, [4] is a fungal infection of the nail. [2] Symptoms may include white or yellow nail discoloration, thickening of the nail, and separation of the nail from the nail bed. [2] Fingernails may be affected, but it is more common for toenails. [3] Complications may include cellulitis of the lower leg. [3]

  6. Human vestigiality - Wikipedia

    en.wikipedia.org/wiki/Human_vestigiality

    Human vestigiality. The muscles connected to the ears of a human do not develop enough to have the same mobility allowed to monkeys. Arrows show the vestigial structure called Darwin's tubercle. In the context of human evolution, human vestigiality involves those traits occurring in humans that have lost all or most of their original function ...

  7. Lunula (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Lunula_(anatomy)

    The lunula is the white crescent-shaped area at the base of a nail. The lunula, or ( pl.: lunulae; from Latin 'little moon'), is the crescent-shaped whitish area of the bed of a fingernail or toenail . In humans, it appears by week 14 [1] of gestation, and has a primary structural role in defining the free edge of the distal nail plate (the ...

  8. Green nail syndrome - Wikipedia

    en.wikipedia.org/wiki/Green_nail_syndrome

    Green nail syndrome is an infection that can develop in individuals whose hands are frequently submerged in water resulting in discolouration of the nails from shades of green to black. [3] [4] It may also occur as transverse green stripes that are ascribed to intermittent episodes of infection. [3] It is usually caused by the bacteria ...

  9. Intramedullary rod - Wikipedia

    en.wikipedia.org/wiki/Intramedullary_rod

    Intramedullary rod. An intramedullary rod, also known as an intramedullary nail (IM nail) or inter-locking nail or Küntscher nail (without proximal or distal fixation), is a metal rod forced into the medullary cavity of a bone. IM nails have long been used to treat fractures of long bones of the body.

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