A&P: integument Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Term | Description |
Keratinocytes | majority puoduce keratin (fibrous protien), joined by desmosomes, stratum basale, live 25-45 days |
Melanocytes | make melanin, stratum basale, melanin granules eventually sent to keratinocytes |
Merkel cells | occasional, associated w/ sensory nerve endings for touch |
Langerhans' cells | macrophages, stratum spinosum |
Stratum corneum | cornified layer, composed of flattened thick keratinized cells that protect against abrasion/penetration but constantly exfoliate, dead cells |
Stratum spinosum | Spiny layer, containing many keratin fibers and desmosomes, resists tension |
Stratum basale | constant mitosis replaces epidermis from basal layer |
Stratum granulosum | keratin forming granules, lamellated granules, cells beginning to flatten and membrane thickens |
What is thick skin? | skin of palms, soles, and fingertips. Has an extra layer under corneum: stratum lucidum |
What are the layers of the epidermis (superficial to deep, thin skin) | stratum corneum, stratum granulosum, stratum spinosum, stratum basale |
Apoptosis | normally cells of trans/intermed. layers of epidermis go through this, resulting in protective layer of flattened dead cells of cornified layer |
Squamous cell carcinoma | cancer occuring in keratinocytes of intermediate or transitional layers of the epidermis |
Basal cell carcinoma | abnormal growth of basal cells |
Melanoma | cancer of melanocytes and is most dangerous bc often metastizes to other tissues/organs |
Dermis type of tissue | dense connective tissue |
Dermis common cells | fibroblasts, macrophages, some mast cells and WBC |
Dermis semi fluid matrix | collagen, elastin, reticular fibers |
Dermis layers | 2 layers: Papillary (areolar connective tissue) and Reticular layer (dense, irregular conn tissue) |
Papillary layer | thin, dermal papillae(upper edges) , dermal ridges (form fingerprints) |
Reticular layer | cleavage lines (affect incision gapes), flexure lines (folds around joints) |
Eccrine glands | most common, important for thermoregulation, acidic, sweat mostly water |
Apocrine glands | dont secrete anything till puberty, sweat, fat , and protiens, pheromones |
Ceruminous glands | modified apocrine gland, earwax |
Mammary gland | specialized sweat gland, secretes milk |
Sebaceous glands | secretes sebum, softens and lubricates hair and skin, simple holocrine gland |
Things involved in touch feeling in skin | merkel cells, root hair plexus, meissners corpuscle, pacinian corpuscles, free nerve endings |
arrector pili function | raises skin in goosbumps to produce insulating layer of air |
Hair follicle layers from middle to outside | medulla, cortex, sheath. hair papilla protrudes up into hair root, then matrix (for growth) on top of that |
Nails | composed of hard keratin, growth similar to hair |
Created by:
hanalin2
Popular Anatomy sets