the integumentary system Flashcards
Diagrams from the text book, with structures of the integumentary system pointed out. (38 cards)
stratum granulosum
Below corneum
flattened cells
Contain Keratohyaline granules
Hypodermis
Adipose
Insulator
Superficial fascia
Langerhans’ cells
Dendritic cells
thin skin
Covers the rest of the body
epidermis
keratinized stratified squamous epithelium
outermost shield of body
avascular
stratum spinosum
Below granulosum
Contain thick bundles of intermediate filaments
stratum corneum
made of about 30 layers of tightly packed dead cells= keratin for protection
functions of integumentary system
Protection Body temp regulation Excretion Production of vitamin d Sensory reception
stratum basale
attached to underlying dermis
apocrine sweat glands
Sweat glands
Axillary, anal, genital
Body odor
melanocytes
make melanin for skin color
dermis
tough, made of fibrous connective tissue
Two regions
Papillary and reticular
kerantinocytes
make keratin- protective
squamous cell carcinoma
Arises from the keratinocytes of the stratum spinosum
Appears as a lesion, reddened
stratum lucidum
only in think skin, clear
Merkel cells
Tactile epithelial cells
sensory reception for touch in conjunction with sensory neuron
malignant melanoma
most deadly and life-threatening
Cancer of melanocytes
Invasive
Moles
sebum
oily substance secreted by sebaceous glands(skins oil glands)
eccrine sweat glands
Sweat glands
Palms, soles, and forehead
Open at the surface at pore
papillary layer
Areolar
dermal ridges due to papilla (little cone shaped projections)
recticular layer
Dense irregular
basal cell carcinoma
most common type
Dome shaped, develop into ulcers
Grow slowly. Hardly metasize
Cells of stratum basale invade dermis and hypodermis
Thick skin
Covers palms and soles, no hair follicles
Stratum lucidum
Nail
Scalelike modification of the epidermis
Dead, keratin used cells