Test 1 (Final) Flashcards
This deck was created by combining two or more decks
Stratum basalt
Basal layer 5th layer One layer of rapidly dividing cells Has melanacytes Has merkel discs
Lamellar bodies
Produce lamellated granules
Which secrete the glycolipids
1st degree burn
Only on the epidermis
Red and painful
Heals in a week without scarring
Reticular layer
2nd layer of dermis
80% of the dermis
Dense irregular connective tissue with large bundles of collagen and elastin
Malignant melanoma
Least common
Arises from melanocytes
Develops as a large, flat, spreading sore, or a lump under the skin
Metastasis is common, usually fatal
Papillary layer
1st layer of dermis
Immediately below that stratum basale
Areolar connective tissue with collagen and elastin
Dermal papillae on palms form fingerprints
Merkel discs
Touch receptors
Squamous cell carcinoma
Cells in the stratum spinosum continue unregulated cell growth
Rarely the tumor migrates from the epidermis to the dermis and can metastasize
Integumentary system functions
Protection
Body temperature regulation
Sensation
The skin
Largest organ of the body
Composed of epidermis and dermis
Stratum corneum
Top layer of epidermis
Hard layer
20-30 layers of dead cells filled with keratin
Water proofing glycolipids
Dermis
Dense irregular connective tissue Has: Blood vessels Nerve endings Hair follicles Glands Smooth muscle
Stratum granulosum
Granular layer
3rd layer
3-5 layers of cells that are alive but dying
2nd degree burn
Epidermis and dermis are damaged Red and painful Edema (swelling) usually develops Blisters develop Heal in 1-2 weeks, scarring depends on extent of dermal damage
Sebaceous gland
Present everywhere except palms and soles
Secretes sebrum
Softens and lubricates hair and skin
Stratum spinosum
Spiny layer 4th layer 5-7 layers of living cells Has melanin granules Has langerhan's cells
Langerhan’s cells
Cells of the immune system that have migrated from the bone marrow
3rd degree burn
Epidermis and dermis are completely destroyed
Skin can only regenerate from the edges
Skin grafts are often necessary
Basal cell carcinoma
Least malignant
Most common
Begins in the stratum basale
Tissue destruction produces an ulcer
Surgical removal or radiation therapy
Meissner’s corpuscles
Touch receptor in dermis
Melanacyte
Produces melanin granules
Pacinian corpuscles
Pressure receptors in dermis
Stratum lucidum
Clear layer
2nd layer
2-3 layers of dead cells filled with keratin
Only found in hard skin (soles, palms)
Epidermis
Outermost
Stratified squamous epithelium
Most cells produce keratin