Nail Anatamoy Flashcards
Why should cosmetologists have a thorough understanding of nail structure and growth
Be able to differentiate between cuticle and eponychium before services
Why should cosmetologist be knowledgeable about nail structure and growth?
Understanding, growth, cycles and natural nail structure prepares for nail services
What does the natural nail include?
All parts of the finger from tip to first knuckle
The natural nail is technically called what?
The onyx
What is the fiber shaped protein that mainly makes up the natural nail?
Keratin
Identify a characteristic of a healthy nail
The nail is translucent and slightly pink showing through from the nail bed
The nail bed, nail fold, eponychium, paronychium, and hyponychium are collectively called what?
Perionychium
What is the whole skin flap that covers the matrix from the visible nail plate’s edge to the first joint of the finger or toe.
Proximal nail fold (PNF)
What is the section of living skin that supports the nail plate as it extends toward the free edge?
Nail bed (sterile matrix)
Which of the following statements is true of the nail plate?
The hardened keratin plate that rests on top of the nail bed
What is part of the natural nail that contains nerves, blood vessels and lymph to nourish cells that differentiate and become Careyes to form the nail plate?
Matrix
What is the Lanula?
Whitish, half moon shape under the nail plate
What is the difference between the cuticle and the eponychium?
The cuticle is dead tissue stuck to the nail plate
The eponychium is living skin under the PNF found at the nail plate covering the matrix
What is the function of the hyponychium?
It helps form a protective barrier, preventing microorganisms from infecting or invading the nail
What is the tough band of fibrous tissue that links bones or keeps an organ in place called?
Ligament
What statement is true of growth of the nail plate?
Growth is affected by nutrition, exercise, and overall health
Which nail grows fastest?
The nail of the middle finger
What’s a true statement of nail growth rates?
They decrease with age
Ordinarily, complete nail plate replacement for a fingernail takes about how long?
4 to 6 months
The nail matrix causes the nail plate to develop a series of slender grooves because why?
As you age, the matrix produces fewer cells
What is the water content of a healthy nail?
15 to 25%
The average rate of nail plate growth in an adult is about how long?
1/10 to 1/8 of an inch a month
Which of the following is not part of the perionychium?
Distal phalanx
What does a longer matrix lead to?
A thicker nail plate
