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Related Flashcards
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Cards In This Set
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Define Integument.
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Integument: Covering
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What are the two main layers of the skin?
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The two main layers of the skin are the Epidermis: outer layer and the Dermis: inner layer
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What are the general functions of the skin?
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The general functions of the skin are prevention of dehydration, maintenance of body temperature, get rid of wastes, reception to stimuli, vitamin D synthesis, and storage of nutrients.
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What is vitamin D synthesis in the skin responsible for?
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Vitamin D synthesis in the skin is responsible for increases in the 'feel good' molecule serotonin.
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What does the epidermis lack?
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The epidermis lacks blood cells and constantly produces new cells.
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What are the layers of the epidermis?
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The layers of the epidermis are deep to superficial: Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
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Which layer does mitosis take place?
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The stratum basale is the layer in which mitosis takes place.
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Where are melanocytes from and what do they do?
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Melanocytes are mostly in the stratum basale and produce melanin, which darkens with exposure to ultra violet light (the sun).
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What are desmosomes?
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Desmosomes are a disk shaped structure that serves to link one cell to another in skin (and cardiac muscle tissues), which helps in holding the structure together.
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What is the stratum lucidum?
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The stratum lucidum is a layer of dead cells that is present only in thick skin (palms, soles of feet).
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What happens to the cells on the stratum corneum?
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The cells on the stratum corneum are constantly being sloughed off and replaced by cells originating in the stratum basale.
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What is the stratum corneum?
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The stratum corneum is composed of dead epithelial cells and provides an 'overcoat' protection.
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What does the dermal-epidermal junction do?
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The dermal-epidermal junction supports the epidermis, binds to the layers of the skin, and is WHERE A BLISTER FORMS.
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What does the dermis contain?
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The dermis contains collagenous fibers, elastic fibers, and a gel ground substance.
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What does the dermis create visually?
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The dermis is what creates the visible effects of skin damage (wrinkles)
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