Anatomy 1
Dead, colorless tissue attached to the natural nail plate.
Cuticle
Part of the nail plate that extends over the tip of the finger or toe.
Free Edge
Tough band of fibrous tissue that connects bones or holds an organ in place.
Ligament
The average rate of nail plate growth in the normal adult
2.5 mm-3mm per month
A healthy nail may look dry and hard, but its water content is actually what percentage?
15-25%
Slightly thickened layer of skin under the nail that lies between the fingertip and free edge of the natural nail plate.
Hyponychium
Area where the nail plate cells are formed; this area is composed of matrix cells that produce the nail plate.
Matrix
Portion of the living skin that supports the nail plate as it grows toward the free edge.
Nail Bed
True or False: Nail growth rate is fastest on the nail of the middle finger
True
Nail biting is known as
Onychophagia
Thin layer of tissue that attaches the nail plate and the nail bed.
Bed Epithelium
Furrow on each side of the nail.
Nail Groove
When the nail is abnormal in shape or form.
Nail Malformation
About how long does it take for the toenail to be completely replaced?
9 months to a year
True or False: Fingernails sweat.
False
Living skin at the base of the natural nail plate that covers the matrix area.
eponychium
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.
Nail Plate
Also known as onyx; the hard protective plate is composed mainly of keratin, the same fibrous protein found in skin and hair. The keratin in natural nails is harder than the keratin in skin or hair.
Natural Nail
Name 4 factors that affect nail growth.
Age, season, hormones, position on the body.
When were the first nail clippers patented?
1875
Visible part of the matrix that extends from underneath the living skin; it is the whitish, half-moon shape at the base of the nail.
Lunula
The tissue bordering the root and sides of a fingernail or toenail.
Perionychium
Also known as lateral nail fold; the fold of skin overlapping the side of the nail.
Sidewall
What determines the thickness, width, and curvature of the natural nail plate
The matrix
In ancient Egypt, the symbol of a woman’s status was the color of her nails. What color indicated the highest rank?
Red