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
role of sebum
lubricates the skin and forms emulsion
some of the functions of skin include
Protection from environment
Prevents penetration
Perception
Temperature regulation
Wound repair
Absorption and excretion
Production of vitamin D