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11 Cards in this Set
- Front
- Back
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Compare the structures and functions of the epidermis and the dermis.
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epidermis: layers of dead, flattened cells covering layers of live cells that continually divide. Its function: protection; dermis: thicker layer, contains blood vessels, nerves, nerve endings, hair follicles, glands. Its functions: detects external stimuli, produces sweat, hair, and oil
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Identify and interpret the functions of the integumentary system.
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covers the body, detects external stimuli, temperature regulation, produces oil to prevent drying out, hair for protection and insulation
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Compare how the skin interrelates with other organ systems to maintain a constant body temperature.
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Skin nerve endings detect stimuli and signal the nervous system, which stimulates other body systems in response
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How does the skin respond to external stimuli?
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External nerve endings in skin detect temperature, pressure, and pain; nerve endings relay information to the brain for a response.
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How could third-degree burns over a significant portion of the skin affect the body as a whole?
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The body is susceptible to infection and drying out; if enough skin is damaged, it can become life-threatening
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Outline steps that occur as a cut in the skin heals.
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A blood clot forms. Blood vessels dilate and infection-fighting white blood cells rush to the wound. Epidermal cells divide to fill in the wound (scab). Scab falls off to reveal new skin.
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in humans and some other animals, the outermost protective layer composed of an outer layer of dead cells and an inner layer of living cells.
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epidermis
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protein found in the exterior portion of the epidermis that helps protect living cells in the interior epidermis.
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keratin
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pigment found in cells of the interior layer of the epidermis; protects cells from solar-radiation damage.
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melanin
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inner, thicker portion of the skin that contains structures such as blood vessels, nerves, nerve endings, hair follicles, sweat glands, and oil glands.
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dermis
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narrow cavities in the dermis from which hair grows.
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hair follicle
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