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9 Cards in this Set
- Front
- Back
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Describe the structures and main functions of the skin.
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The structures of the skin are Epidermis, Dermis and Subcutaneous a/k/a “hypodermis”. The main function of the skin is to protect. Other functions are to thermoregulation, metabolism, sensation and communication.
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Explain the functions of keratin and melanin
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Melanin is a brown-black pigment produced by melanocytes and it protects the body from the damaging effects of UV light. Keratin is a protein and is the body’s true protector as it creates a waterproof barrier which does not allow microorganisms to penetrate the skin.
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Identify the structures and functions of a fingernail or toenail
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Structures of the fingernail are Nail Matrix, Lunula (white half-moon area of the nail) Cuticle (band of epidermis covering the nail bed) and Nail bed the epidermis under the nail. The function of the nail is to protect the sensitive tips of the fingers and toes.
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Compare and contrast the functions of the sudoriferous glands and the sebaceous glands
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Sudoriferous glands are sweat glands located in the dermis. (1) Apocrine (2) Eccrine (3)Mammary
Sebacceous glands are oil glands that lie close to the hair follicles and produce sebum which makes hair soft and glossy. It also protects drying of the skin. |
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Define and give example:
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Radiation the diffusion or dissemination of heat by electromagnetic waves
Ex: body gives off waves of heat from uncovered surfaces Convection dissemination of heat by motion between ares of unequal intensity Ex: oscillating fan blows currents of cool air across the surface of body Evaporation the conversion of liquid to vapor Ex: body fluid in the form of perspiration Conduction transfer of heat to another object during direct contact Ex: body transfers heat to an ice pack causing it to melt |
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Explain the purpose of “goose bumps” and “goose flesh”
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Goosebums are raised by arrector pili mucles and provide an insulating layer against the cold
Goose flesh helps warm the body; blood vessels constrict, shivering and the gooseflesh are thermoregulation processes that help warm the body. |
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Discuss the skin’s role in sensory awareness
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The skin receives stimuli from the outside world providing a dynamic interaction between external and internal environments. Nerve endings register pain and the body reacts. Communication occurs through facial expressions or movements.
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Name five changes that occur in aging skin
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Age spots, dark red patches, wrinkles, women get facial hair, toe nails get thick , hair thins
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Describe two ways to protect skin from damage
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Hydrate and nutrients; wear sun screen and eat healthy.
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