Chapter 5 The Integumentary System Flashcards
4 Parts of the Cutaneous Membrane: Epidermis, Dermis, Papillary ______ Reticular
Largest Sys of Body - 16% body weight
2 Components of the Integumentary System are
Cutaneous membrane and accessory structures
Cutaneous - Outer Epidermis (Superficial Epidermis , Inner Dermis (Connective Tissue
Accessory Structures Originate In Dermis, Extend through Epidermis, Hair & Follicles - Exocrine Glands and Nails
Epidermis Thin Skin, 4 layers Bottom up - Stratum Basale - Spinosum - Granulosum - Corneum , Keratinocytes, Body’s most abundant.
Epidermis Thick skin , Finger pads - 5 layers, Stratum Basale - Spinosum - Grandulosum - Lucidum - Corneum
Functions of Int Syst - Protect underlying tissue, Excrete Salt water waste, Maint Temp,
Produce Melantin, Keratin (Protein), D3, Lipids Storage, Sensory to touch, Coord Immune response
Tactile Corpusle - Feelings
Aerrctor Pili Muscle - goose bumps
Dermis - Between EpiDerm and Subcu - Supports EpiDerm -
Anchors Accessory Structures - Hair - Sweat Glands
Keratin = Protein - Large Amts in Stratum Spinosum
Cutaneous & Subpapillary Contains - Blood Vessels and Sensory Receptors
Thick Skin - Palms and Soles, Finger Pads
Subcutaneous - Loose Connective tissue below the Dermis
Reticular Layer - Extensive Distention ____ Stretch Marks, Reticlular Layer
UV causes excessive skin sag
Hair _____ made up from Keratinized dead cells
Hair is formed in the folicles
Dermis - 1) Outer Papillary Layer 2) Deep Reticular Layer
Tactile Discs - Melanocytes , Tactile Corpusles - Feeling Touch
Hair color produced by Melanocytes at the Hair Matrix
Hair color is Determined by Genes
Vellus hair ____ peach fuzz Soft fine hair, covers most of body
Terminal Hairs - Head Eyebrows and Eyelashes (Heavy Pigment)
Epedermis - Stratified Squamous Epithelium
Is Avascular - (without)
Hair growth cycle ____ grow and shed
Cutaneous Plexus - arteries in the skin form.
Sebaceous (oil glands) and Sweat Glands are Endocrine Glands
Eccrine Sweat Glands - Holocrine Glands - Sensible Perspiration (Watery Substance)