SKIN and nails Flashcards
3 layers of the skin include
epidermis, dermis and subcutaneous tissue layer
2 major types of epidermal cells include
keratinocytes ( 90%) melanocytes 5%
epidermis regenerates its cells every
28 days
epidermal cells contain ?
Melanin, protects against UV and gives color to the skin and hair
The dermis contains
Contains nerves, sensory receptors, blood vessels, and lymphatics
dermis=
Thickness=
connective tissue/ collagen under the epidermis
1- 4 mm
what is embedded in the dermis ?
Appendages from the epidermis such as the hair follicles, sebaceous glands, and sweat glands are embedded in the dermis
appendages of the skin include
Hair
- Nails
- Glands (Sebaceous, Apocrine, And Eccrine).
nails grow from where ?
the matrix located at the proximal area of the nail plate
nails are made up of ?
hard plate of kertatin found on the dorsal edge
nail bed is normally what color ?
Pink from the highly vascular epithelial cells
The lunula is ?
White half moon seen through the nail plate
apocrine glands open into and can be found where ?
The hair follicle and can be found Scalp, face, upper chest back, axillae, breast areolae, groin
eccrine glands open where and are found where ? they produce
open directly on the skin surface , found covering the entire body mostly and produce sweat
sebacaecous glands produce
sebum which is emptied to the hair follicle
