Funtional Anatomy Flashcards
Integumentary system
Most accessible organ
Cutaneous membrane
Epidermis
Dermis
Epidermis
Stratified squamous, epithelium
Made of mostly keratinocytes
Continuously produced
Merkel cells
Sensory neurons for pain and temperature
Dermis
Papillary layer (areolar connective tissue)
Reticular layer (dense irregular connective tissue)
Contains collagen and elastin
Has more specialized receptors
Accessory structures
Hair shaft
Sweat gland
Sebaceous gland
Nerve fibers
Cutaneous plexus (blood vessels)
Functions of IS
Protect internal tissue from impact, abrasion, fluid loss, and chemicals
Excretion
Maintenance of body temperature
Production of melanin
Produce keratin which is a water repellent
Synthesis of vitamin D
Stores lipids detect touch and pain
Thin skin
4 layers of strata
Thick skin
5 layer or strata
Only palms and soles of feet
Stratum corneum
Dead cells
Top layer
Stratum lucidum
Dead cells
Not in thin skin
Stratum granulosum
Last layer of living cells
Stratum spinosum
Immune cells
Strata basale
Single layer of cells
Creates all epidermal cells
Skin color
Influenced by melanin, carotene, Blood
Protects against UV radiation
Melanocytes
Make melanin
Protects cells from UV radiation
Carotene
Orange- yellow pigment
Blood supply
Red coloration from hemoglobin
Basal cell carcinoma
Most common skin cancer
Stratum basale response to UV radiation
Many people survive
Does not spread
More common in people under 30
Malignant melanoma
Spreads
Cancerous melanocytes
Detected early high survival rate
Deadly if not found
Line of cleavage
Formed arrangement of collagen and elastin fibers in the skin
Significant for surgery and would healing
Parallel = better
