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Nails
Anatomy of the fingernail
10
Anatomy
Undergraduate 2
08/25/2009

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Term
Matrix
Definition
This is the only living part of the nail. It is situated behind and underneath the Nail Fold and produces protein keratin which makes up the Nail Plate. If the matrix is ever damaged in any way, it would affect the Nail Plate growth.
Term
Eponychium
Definition
This is the dead skin that forms around the cuticle area. This can be lifted and trimmed during a professional manicure treatment. Tends to be more prominent on males.
Term
Paranychium
Definition
this is the live skin that folds around th cuticle area giving protection to the matrix
Term
Hyponychium
Definition
Is the area of attachment between the Nail Plate and Nail Bed that lies underneath the free edge. Anatomical terms of location Proximal and distal, end of the nail.
Term
Nail Plate
Definition
Is the hard and translucent which is composed of layered protein keratin.
Term
Nail Bed
Definition
The pinkish color of the nail plate. also determines the shape
Term
Lanula
Definition
Tends to only be visable in larger nails It is the whitish crescent shape arou nd the base of the nail plate. Is the shadow of the matrix.
Term
Nail fold
Definition
A fold of hard skin overlapping the base and sides of the fingernail and toenail.
Term
Free edge
Definition
The part of the nail the extends past the finger, beyond the nail plate. Should always be present to prevent infection.
Term
Nail Groove
Definition
Acts as runners on drawers and guides the direction of nail growth. Tehy are situated down the sides of the nail fold.
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