Skin Flashcards
largest organ of the body.
, largest organ of the body.
●protects underlying tissues and organs from microorgaisms, physical trauma, UVR and dehydration
●It plays a vital role in temperature maintenance, fluid and electrolyte balance, absorption, excretion, sensation and Vit D synthesis.
Skin
THREE LAYERS of the skin
Epidermis
Dermis
Subcutaneous tissue
dead keratinized cells (waterproof)
➢Replaced every 3-4 weeks
Epidermis
5 layers of epidermis
STRATUM CORNEUM,
STRATUM LUCIDUM,
STRATUM GRANOLUSUM,
STRATUM SPINOSUM &
STRATUM GERMINATIVUM (BASALE
cell division, contains melanin (brown pigment and keratin- forming cells, keratin
Stratum Germinativum
Inner layer of the skin
Well vascularized connective tissue layer containing collagen, elastic fibers, nerve endings and lymph vessels.
DERMIS
– unique pattern of friction ridges (fingerprints)
Dermal Papillae
Loose connective tissue containing fat, cells, blood vessels.
-Stores fat as an energy reserve, provides
SUBCUTANEOUS TISSUE
Distal phalanges of fingers and toes are hard, transparent plates of keratinized epidermal cells that grow from the cuticle.
protect the distal ends of the fingers, toes, enhance precise movement of the digits and allow for an extended precision grip.
NAILS
PARTS of nails
Nail body
Lunula
extends over the entire the nail bed and has a pink tinge as a result of blood vessels underneath.
Nail Body
– crescent- shaped area located at the base of the nail.
Lunula
