Nail Structure & Growth
Download
Report
Transcript Nail Structure & Growth
Module 09 – 12’
**
write on page 198**
Reflect general health of body
Educate yourself
Natural nail’s structure & growth
You
can expertly groom, strengthen &
Beautify nails
Knowing the difference between cuticle &
eponychium
Prepare you for advanced nail services
Technical
name Onyx
Natural nail
Hard protective plate
Protein – Keratin
Appendage of the skin (integumentary system)
Composed of keratin
Same as found in hair & skin
Healthy
nail
Whitish
Translucent
Pinkish color of nail bed showing through
Firm flexible
Did
You Know page 198 & 199
Porous to water
Water content
Relative to humidity of surrounding environment
15% - 25%
Directly effects flexibility
Oil-based
nail conditioner/nail polish
Improve flexibility
Reduce water loss
Most
visible and functional part
Hardened keratin plate sits on and slides
across nail bed
100 layers of nail cells
Free Edge
Extends over tip of finger/toe
Living skin on which the nail plate sits
Richly supplied with blood vessels
Pinkish area
Supplied with nerves
Bed
epithelium
Thin layer of tissue attaching the nail plate to
the nail bed
Helps guide nail plate along bed as it grows
Natural
nail is formed
Contains
Nerves
Lymph
Blood vessels to nourish cells
Create
new cells as long as healthy
Extends under the nail fold at base of nail to
nail plate
Lunula
Lighter color shows the true color of matrix
Growth
can be effected
Poor health
Nail disorder or disease is present
Injury to matrix
** FYI page 200
Dead
colorless tissue attached to plate
Seal the space between natural plate and
living skin above
Prevents injury and infection
Living
skin at base of nail plate covering
matrix area
Cuticle is dead tissue
Eponychium is living tissue – legally we
cannot cut
Slightly
thickened layer of skin underneath
free edge
Creates seal under nail plate to prevent
microorganisms from invading and infecting
nail bed
Ligament
Tough band of fibrous tissue that connects bones
or holds an organ in place
Specialized
ligaments
Attach nail bed and matrix to the underlying
bone
Nail
Folds of normal skin that surround nail plate
Form nail groves
Nail
folds
grooves
Slits or furrows on sides of nail on which it moves
as it grows
Sidewall
– lateral nail fold
Fold of skin overlapping the side of the nail
Growth
of nail plate affected:
Nutrition
Exercise
Person’s general health
Length,
width and curvature of matrix
determine the thickness, width and
curvature of the natural nail plate
Longer matrix produces
Thicker nail plate
Highly
curved matrix creates
Highly curved free edge
Average
growth – normal adult is 1/10” per
month
Faster
Summer
Children
Middle finger
Slower
Winter
Elderly
Thumb
Rate
increases dramatically in last trimester
of pregnancy
Hormonal changes in body
Rate
decreases dramatically after delivery
Returns to normal as hormones levels return
to normal
prenatal care vitamins
Myth – makes grow faster
Grow faster whether taken or not (hormone
changes)
Toenails
grow thicker, harder and slower
Did you Know? Page 202
Disease,
injury, or infection occurs in matrix
Shape or thickness of nail plate can change
Natural
nail will grow as long as matrix is
healthy and undamaged
Replacement natural fingernail –
4 – 6 months
Replacement
natural toenails –
9 - 12 months
Nails
are not shed automatically or
periodically as does hair
Creativity
must be rounded in a full
awareness of the structure and physiology of
nails and the surrounding tissue