Skin / Integumentary System Flashcards
Epidermis Tissue & function
Keratinized stratified squamous epithelium
protection, barrier
Dermis (Papillary Layer) Tissue & function
Areolar CT
nutrient supply, sensory
Dermis (Reticular Layer) Tissue & function
Dense Irregular CT
strength, elasticity
Hypodermis Tissue & function
Adipose CT
insulation, cushioning
Glands Tissue & function
Simple cubical epithelium
secretion, regulation
Epidermis layers in order deepest to superficial
Stratum basale
stratum spinosum
Stratum granulosum
Stratum lucidum (thick skin)
Stratum corneum
Epidermal ridges function (Epi)
grip, friction
Tactile Cells (Merkel cells) function (Epi)
touch, sensation
Free Nerve Endings Function (Epi)
pain, temperature
Dermal Papillae (Pap) Function
light touch
Free Nerve endings (Pap) Function
pain, temperature
Tactile Corpuscles (Pap) Function
light touch
Capillaries (Pap) Function
nutrient delivery, thermoregulation
Lamellated Corpuscles (Ret) Function
deep pressure, vibration
Free nerve endings (Ret) Function
pain, temperature
Blood Vessels (Ret) Function
blood flow, nutrients
Blood Vessels (Hypo) Function
supply, insulation
Keratinocytes
produce keratin
Melanocytes
pigment production
tactile cells
touch receptors
Dendritic cells
immune defense
Keratinocyte life cycle
- basal layer: divide, grow
- spinosum layer: strengthen, connect
- Granulosum layer: keratinize, die
- Corneum layer: shed, replace
Sebaceous glands function & location
F: secrete oil (Sebum)
L: Hair follicles
Sweat (merocrine) Glands F & L
F: Cool body
L: skin surface
Apocrine Glands F & L
F: secrete pheromones
L: armpits, groin
Eccrine Glands F & L
F: regulate temperature
L: everywhere, mostly palms, soles
hair matrix F & L
Papilla F & L
F: nourishes hair
L:base of hair follicle
Arrector Pilli F & L
F: raise hair
L: attached to hair follicles
