Definitions Flashcards
Skin
Outermost tissue of the body and largest organ in weight and surface area
Keratinocytes
Skin cells, Adhesion, cytokine production, keratin production, production of vitamin D
Hypodermis/subcutaneous layer
Loose connective tissue and fat underline the dermis to form
Stratum corneum / horny layer
Barrier protection against unregulated loss of salt and water and entry of particles (e.g. chemicals, microbes)
Basal cell layer
Replication and repair
Langerhans cells
Immunological defence
Melanocytes
Protection against uv radiation
Basement membrane
Adhesion of epidermis to underlying zone supporting dermis
Dermis and subcutaneous fat
Strength with suppleness, shock absorption, insulation
Blood vessels
Delivery of nutrients and removal of waste, temp regulation
Eccrine sweat glands
Temperature regulation
Apocrine sweat glands
Production of pheromones
Sebaceous glands
Waterproofing and moisturising
Phagocytic cells
Engulf and destroy bacteria
Fibroblast cells
Synthesis of collagen, elastin, collagenase, fibronectin
Lymphocytes
Immunological defence
Mast cells
Immunological defence, production of histamine
Epidermis
Outermost layer of the skin, composed largely of keratinocytes
Merkel cells
low threshold touch receptors - send projections into the epidermis from their position at the basement membrane
Desquamation
Dead cells from the stratum corneum are continuously sloughed off and replaced by new ones from below
How often does the skin completely renew itself
Approx 28 days
Corneocytes
Protein complex made of tiny threads of keratin in organised matrix
Skin microbiota
Diverse community of microorganisms that live on the skin
Microbiome
Corresponding genetic material - genome
Probiotics
live bacterial cultures
Prebiotics
Not live microorganisms
Natural moisturising factor (NMF)
Complex mixture of water-soluble compounds that bind water
acnegenic
covers the potential of a material to cause and aggravate both comedones and pimples
