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COS CH09
| Term | Definition |
|---|---|
| Bed epithelium | Thin layer of tissue that attached the nail plate and the nail bed. |
| Eponychium | Living skin at the base of the natural nail plate that covers the matrix area. |
| Free edge | Part of the nail plate that extends over the tip of the finger or toe. |
| Hyponychium | slightly thickened layer of skin that lies between the fingertip and fee edge of the natural nail plate. |
| Ligament | Tough band of fibrous tissue that connects cones or hold an organ in place. |
| Lunula | Visible part of the matrix that extends from underneath the living skin; it is the whitish |
| Matrix | Area where the nail plate cells are formed; this area is composted of matrix cells that produce the nail plate. |
| Nail bed | Portion of the living skin that supports the nail plate as it grows toward the free edge. |
| Nail folds | Folds of normal skin that surround the natural nail plate. |
| Nail grooves | Slits or furrows on the sides of the sidewall. |
| Nail plate | Hardened keratin plate that sits on and covers the natural nail bed. It is the most visible and functional part of the natural nail unit. |
| Natural nail | Also known as onyx; the hard protective plate is composed mainly of keratin |
| Nail unit | Composed of several major parts of the fingernail including the nail plate |
| Sidewall | Also known as lateral nail fold; the fold of skin overlapping the side of the nail. |
| Cuticle | Dead |
| Nail Malformation | When the nail is abnormal in shape or form. |
| Perionychium | The tissue bordering the root and sides of a fingernail or toenail. |