Nail

Question 1

What does the nail compose of

Answer 1

-is derived from epidermis

-has stratified squamous epithelium

-has hard keratin

Question 2

What are the folded regions of skin that surround nail plate

Answer 2

Proximal nail fold, medial and lateral nail folds

Question 3

What does the proximal nail fold consist of

Answer 3

-covers nail root

-distal edge of the fold is eponychium (cuticle)

-has stratum corneum

Question 4

What does medial and lateral nail folds consist of

Answer 4

-attached to nail bed by accumulation of stratum corneum called hyponychium

Question 5

Where does nail growth occur

Answer 5

It occurs in the matrix

Question 6

What happens during nail growth

Answer 6

-dividing cells push neighboring cells distally

-die once keratinization is completed and have been cut off from blood supply

-grows 0.5 mm perk week, toenails grow more slowly

Question 7

What is the primary function of nails

Answer 7

-protects underlying tissue (distal tips of fingers and toes) from trauma

-can be used as tools

-precise gripping of itema