### device:

Nail
* Most nails become ingrown at the edge of the end of the nail
  - edge of the nail
* Some nails act as clamps
  - are black and some are silvery, others are gray, and some are white
* Some nails have blood vessels
  - kilograms
  - slow spirals
* allow primates to manipulate objects more easily.
* also become dry and brittle
  - distinguish vegetarians and meat-eaters
  - join wood and such materials as cloth, sheet metal, and wire
* appear on the fingers and toes.
* are a conduit for infection, and also chill the interior of the hoof in cold weather
  - distinguishing feature of the primate order
  - part of the skin and are made of the same protein and keratin as the skin and hair
* are an extension of both the hair and skin
  - our skin
  - important part of appearance
  - brittle and ridged
  - connectors
  - construction materials
  - convex, translucent horny plates situated at the tips of our fingers and toes
  - dead tissue, without nerves or a blood supply
  - easier to cut after soaking or after a bath
  - easiest to cut after bathing when they're softest
  - fasteners
  - hard and preferably dark in color
  - hard, keratinized cells of the epidermis
  - harder than skin, due to their high sulfur content and lack to water
  - important because they can help protect the fingertips and toes
* are located in boards
  - containers
  - jars
* are made in a great variety of forms for specialized purposes
  - of keratin
  - most likely to split and peel when they are dry
* are part of digits
  - houses
  - the outer layer of skin and are made of a protein called keratin
  - tools
  - produced from closely packed epithelial cells along the furrow at the base of the nail
  - rareties, and even leather boots are made with wooden brads
  - shafts
* are short and black in black colored dogs, lighter colored in bronze or blond dogs
  - dark or self-colored, depending on coat color
  - similar to claws in other animals
  - small mirrors of the general health of the body
  - solid objects
* are strong and dark in color
  - used for scratchings
  - usually thin, soft, and bending
  - very useful to archaeologists as they can help date soil layers in a site
* become brittle and lose the moisture underneath.
* can also get sharp and long.
* can be deep-set and thin
  - very close together, or spaced farther apart
  - become detached from the toe or finger
  - dry out, just like skin
  - house and spread the infection
  - separate from the fingers and toes
  - show severe dystrophy with painful paronychia, subungual debris, and linear striations
  - turn thick and white, and eventually crumble if untreated
  - work their way out, or a chewer can eat down the wood around a nail
* consist of highly keratinized, modified epidermal cells.
* follow the same colours as the eye shadows and lips.
* grow faster
  - fastest on the more active hand
  - from the cuticle
  - slowly and are brittle and thick
  - to the end of baby's fingers
* have compositions
  - similar compositions
* hold structures together because of the friction between the nails and the lumber.
* includes bases
  - sections
* infected by fungi can look very unpleasant.
* lose moisture and weaken when exposed to cold weather, water and chemicals.
* often become very hard, thick, and curved
  - creep out when wood expands and contracts because of temperature and moisture
* protect the ends of the digits from trauma
  - tips of fingers and toes from mechanical injury
* protrude to end of finger tips.
* range from the smallest, thinnest brads to large, weighty spikes.
* remain less brittle and cuticles are less likely to split or tear.
* seem to grow fast and strong.
* serve to protect the sensitive skin at the ends of the fingers and toes.
* tend to become thicker and more difficult to cut
  - lose their color and become yellowish