| Term | Definition |
|---|
| cutic | skin |
| derma | skin |
| epi | over/ above |
| folli | bag |
| kerat | horn |
| melan | black |
| seb | grease |
| cyan | blue |
| sudor | sweat |
| organs in the integumentary system | skin/ hair/ nails/ glands/ blood vessels/ muscles/ nerves |
| superficial layer | epidermis |
| deep layer | dermis |
| what is the epidermis is composed of | epithelial cells |
| what is the dermis composed of | highly vascularized connective tissue |
| superficial fascia | hypodermis |
| type of dermis NOT considered part of the skin | hypodermis |
| function of hypodermis | anchors/ shock absorber/ insulator |
| specific type of cell that makes up epidermis | keratinized stratified squamous epithelium |
| keratinocytes, melanocytes, merkel cells, and langerhans cells | cells that make up epidermis |
| 90% of all the cells | keratinocytes |
| Chief role to produce keratin | keratinocytes |
| what tightly connects keratinocytes to one another | desmosomes |
| produced in the stratum basale and move outward as new cells undergo mitosis | keratinocytes |
| 8% of all cells | melanocytes |
| spider-shaped epithelial cells | melanocytes |
| melanocytes synthesize what pigment | melanin |
| dark pigment that provides skin color | melanin |
| melanocytes pass melanin to what nearby cell using long pigment- containing extensions | keratinocytes |
| process in which melanocytes pass melanin to nearby keratinocytes | cytocrine secreation |
| what side of the keratinocytes nucleus do melanin granules accumulate on | superficial side |
| what does melanin absorb | sunlight |
| what protects nucleus of melanocytes from being damaged from UV radiation | melanin absorbing sunlight |
| star-shaped cells | Langerhans cells |
| what type of cells arise from bone marrow and migrate to the epidermis | Langerhans cells |
| help activate our immune system and attack pathogens as they enter the skin | Langerhans cells |
| what cells are located at the epidermal- dermal junction | merkel cells |
| what can merkel cells serve as | sensory receptors |
| 5 layers of the epidermis | stratum basale/ stratum spinosum/ stratum granulosum/ stratum lucidum/ stratum corneum |
| deepest epidermal layer | stratum basale |
| consists of a single row of cells representing the youngest keratinocytes | stratum basale |
| prickly layer | stratum spinosum |
| several layers thick and contain a web-like system of intermediat filaments | stratum spinosum |
| granular layer | stratum granulosum |
| consists of 3-5 cell layers in which the keratinocytes appearance changes drastically | stratum granulosum |
| where the keratinocytes begin to flatten and their nuclei and organelles begin to disintergrate | stratum granulosum |
| two types of granules | keratinohyaline/ lamellated |
| help to form keratin in the upper layers | kerationohyaline granules |
| helps to waterproof and are major factor in slowing water loss across epidermis | lamellated granules |
| clear layer | stratum lucidum |
| consists of a few rows of clear, flat, dead keratinocytes with indistinct boundaries | stratum lucidum |
| horny layer | stratum corneum |
| outermost zone that consists of 20- 30 cell layers | stratum corneum |
| keratin and thickened plasma membraneds of cells protect the skin | stratum corneum |
| an excess of keratinized cells shed from the scalp | dandruff |
Combine with other sets
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