Integumentary System Flashcards
(25 cards)
Layers of Epidermis
Basale, Spinosum, Granulosum, Lucidum, Corneum
Stratum Basale
Single Layer, Mitotic Stem Cells, House Melanocytes and Sensory Nerves
Stratum Spinosum
Several Layers, keratinocytes joined by desmosomes, thick bundles of intermediate filaments made of pre-keratin
Stratum Granulosum
One-Five layers; Lamelar Granules (glycolipid waterproofing), Keratohyaline Granules (Keratin Fibrils)
Stratum Lucidum
Thin translucent band; only in thick skin
Stratum Corneum
20-30 layers, Keratin Cells that sluff off with contact
Layers of Dermis
Papillary Layer and Reticular Layer
Papillary Layer
Areolar CT: Finger like projections; Dermal Papillae; Abundant capillary networks; allow heat control; Touch Receptors (Tacticle corpuscles)
Reticular Layer
Dense Irregular CT: Pressure Receptors (Lamellar Corpuscles)
Skin Color Based on:
Melanin, Oxygenation of blood, and Carotene
Carotene
Yellow/Orange pigment present primarily in stratum corneum and in adipose tissue
Nails: Body
Visible Attached portion
Nail: Free Edge
Tip of the nail
Hyponychium
Underside tip of nail
Nail: Root
Part that is embedded in the skin and adheres to nail bed
Nail bed
Extension of stratum basale beneath the nail
Nail Folds
Skin folds that overlap the borders of the nail
Eponychium
Thick proximal nail fold commonly called the cuticle
Nail Matrix
Thickened proximal part of nail bed that produce thenail.
Lunule
Proximal region of thickened nail that is white crescent
Arrector Pili Muscle
Smooth muscle that pulls on hair follicle
Cutaneous Glands
Sebaceous and Sweat Glands
Sebaceous Glands
Secret sebum which acts as an oil for hair/skin
Eccrine
Sweat gland that secret water, salt, urea (all over skin)
