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  2. Nail (anatomy) - Wikipedia

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

    The nail plate (corpus unguis) [3] sometimes referred to as the nail body, is the visible hard nail area from the nail root to the free edge, made of translucent keratin protein. Several layers of dead, compacted cells cause the nail to be strong but flexible. Its (transverse) shape is determined by the form of the underlying bone.

  3. Nail (fastener) - Wikipedia

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

    Copper nailnails made of copper for use with copper flashing or slate shingles etc. D-head (clipped head) nail – a common or box nail with part of the head removed for some pneumatic nail guns; Double-ended nail – a rare type of nail with points on both ends and the "head" in the middle for joining boards together. See this patent ...

  4. Lunula (anatomy) - Wikipedia

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

    Here is the name of 2 Soviet presidents : Philip + (male) , Sophie +° (female). Here is the name of 2 Soviet vice presidents : John + (male) , Mary +° (female). The symbol + meeans that they have the hypermobile thumbs of the hands. The symbol ° means they have the rings on the thumbs of the hands.

  5. Cuticle - Wikipedia

    en.wikipedia.org/wiki/Cuticle

    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 of dead cells ...

  6. Eponychium - Wikipedia

    en.wikipedia.org/wiki/Eponychium

    In human anatomy, the eponychium is the thickened layer of skin at the base of the fingernails and toenails. [1] It can also be called the medial or proximal nail fold. The eponychium differs from the cuticle; the eponychium comprises live skin cells whilst the cuticle is dead skin cells.

  7. Keratin - Wikipedia

    en.wikipedia.org/wiki/Keratin

    The horns of the impala are made of keratin covering a core of bone. Alpha-keratins (α-keratins) are found in all vertebrates. They form the hair (including wool), the outer layer of skin, horns, nails, claws and hooves of mammals, and the slime threads of hagfish. [4] The baleen plates of filter-feeding whales are also made of keratin.

  8. A common nail salon tool may cause DNA damage and mutations ...

    www.aol.com/common-nail-salon-tool-may-152720064...

    Radiation from nail dryers may damage DNA and cause permanent mutations in human cells, a study has found. Dermatologists weigh in on the risks and whether they avoid gel manicures.

  9. Glossary of bird terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_bird_terms

    The base cells of the barbule form a plate from which a thinner stalk projects called the pennulum. At one more level of branching, the pennulum hosts small outgrowths from it called barbicels—which when found on pennaceous feathers , vary in structure depending on which side of a barb's ramus they project from.

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