Term
| What are the components of the integumentary system? |
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Definition
| Skin & its derivatives(nails, hair, sweat glands, sebaceous glands) |
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Term
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Definition
| barrier, immunological function, homeostasis, sense organ, thermoregulation , endocrine function, & excretion |
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Term
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Definition
| Epidermis, dermis, and hypodermis |
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Term
| Characterisitcs of the Epidermis. |
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Definition
| epithelial tissue, avascular, protective layer. |
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Term
| What cells are found in the epidermis? |
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Definition
| Stem cells, keratinocytes, melanocytes, merkel cells, and langerhan cells. |
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Term
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Definition
| undifferientiated cells that give rise that divide to give rise to keratinocytes. |
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Term
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Definition
| epidermal cells that secrete keratin a protective layer. |
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Term
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Definition
| cells in the stratum basale that synthesize melanin. |
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Term
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Definition
| epidermal dendritic cells . phagocytes that arise from the bone marrow & epidermis. |
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Term
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Definition
| cells situated in the epidermal-dermal junction. they act as touch receptors |
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Term
| Name the layrs of the epidermis. |
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Definition
| Stratum Basale, Stratum Spinosum, Stratum Granulosum, Stratum Lucidum, and Stratum Corneum. |
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Term
| Describe the Stratum Basale |
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Definition
| 1layer of stem cells, base layer,has active keratinocytes. Also has melanocytes and merkel cells. |
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Term
| Describe th Stratum Spinosum |
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Definition
| after the basale. Has spiny cells (Keratinocytes)& pre- keratin filamnts attached to each other by desmosomes. |
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Term
| Describe the Stratum Granulosum layer. |
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Definition
| last layer of non keratinized epidermis. Last layer in w/c cells are alive. nucleus & organelles are breaking down! Lamellated granules & keratinohyaline granules |
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Term
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Definition
| After the granulosum. has flat, dead keratinocytes. Seen only in thick skin like palms, soles. |
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Term
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Definition
| broad zone of dead , scaly keratinized cells . Resistant to water loss |
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Term
| What are Lamellated granules? |
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Definition
| little packages with glycolipids that make cells water proof. |
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Term
| How often does the epidermis regenerat? |
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Definition
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Term
| What is one disease of the Keratinocyte? |
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Definition
| Basal cell carcinoma(cancer of the stratum basale, least malignant) |
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Term
| What is squamous cell carcinoma? |
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Definition
| Cancer of the stratum spinosum.. it grows rapidly (treated with surgery and radiation) |
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Term
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Definition
| cancer of the melanocytes. |
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Term
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Definition
| assymetry, border irregularity, color, diameter(greater than 6mm), elevation |
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Term
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Definition
| layer beneath the epidermis. flexible connective tissue, collagen, fibroblasts, elastic fibers, reticular fibers, mast cells, blood vessels, nerve cells, sweat glands. |
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Term
| What are the layers of the Dermis? |
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Definition
| papillary layer(finger like extensions of the dermis,epidermal ridges, areolar loose c. tissue, meissner's corpuscles.) and reticular layer(dense irregular connective layer, collagen layers, cleavage line, elastin) |
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Term
| How do finger prints form? |
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Definition
| from the wavy bounderies of the dermal papillae |
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Term
| How are strach marks formed? |
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Definition
| stretching of the reticular layer. |
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Term
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Definition
| underlines the dermis &mainly adipose tissue. |
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Term
| Functions of the hypodermis |
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Definition
| fat storage, loose anchor,shock absorber, insulator |
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Term
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Definition
| touch receptors, filters, prevents heat loss, sunlight protection. |
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Term
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Definition
| shaft(outside the skin) & root (embedded in the skin) |
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Term
| What determines hair color? |
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Definition
| different types of melanin |
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Term
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Definition
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Term
| What is Necrobiosis Lipoidica? |
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Definition
| a degenerative collagen disease which leads to bleeding and ulceration of cells |
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Term
| What is the component of nails? |
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Definition
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Term
| what the 3 main parts of a nail? |
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Definition
| free edge, body and root. |
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Term
| What determines the hair texture(curly, wavy,)? |
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Definition
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Term
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Definition
| Eccrine and Apocrine glands. |
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Term
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Definition
| found in palms, soles, forehead. Produce true sweat (99% water, dermicidin antibiotic, vitamin C) |
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Term
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Definition
| found in anogenital & axillary areas like armpits(tru sweat, fatty substances and proteins). |
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Term
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Definition
| When bacteria decomposes the sweat. |
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Term
| What are sebaceous glands? |
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Definition
| glands that are eveywhere except in palms and soles. they secrete sebum |
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Term
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Definition
| softens hair and skin, keeps skin moisturized, bacterialcidal. |
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Term
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Definition
| appcrine glands in the ear canal that secrete ear wax (cerumn) that blocks entry of foreign material |
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Term
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Definition
| secrete milk in response to hormones |
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Term
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Definition
| chemical barriers, physical barrier, biological barriern body temp. regulation, sensation, metabolism, excretion and blood reservior |
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Term
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Definition
| tissue damage caused by intense heat, electricity, radiation, and chemicals |
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Term
| What is the main threat of burns? |
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Definition
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Term
| what is the rule of nines? |
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Definition
| used to determine the volume of fluid lost from burns |
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Term
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Definition
| superficial redness, swelling, pain in the epidermis only. |
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Term
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Definition
| epidermis and upper epidermis, redness , swelling, blistering & very painful |
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Term
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Definition
| full thickness burns, entir thickness of the skin. Not painful! |
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Term
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Definition
| if over 25% is 2nd degree burns, 10% 3rd degree, or 3rd degree on hands , face or feet |
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Term
| Characteristics of aging. |
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Definition
| thinning or epidermis, age spots , synthesis of collagen & elastin fibers slows, melanin pdn slows, reduced sensitivity to pain and pressure & reduced temp regulation ability |
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Term
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Definition
| reduction in collagen & elastin fiber production leading to sagging of the dermis. |
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