Health Sciences 3701A/B Chapter Notes - Chapter 3: Stratum Corneum, Hair Follicle, Cholecalciferol
20 Jan 2016
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Largest organ and body system: 3,000 square inches and 6 pounds. Serviced by 1/3 of all blood circulation in the body. Intrinsic factors of aging: individual genes, that determine sex, phenotype, hormonal balance, rate of aging & propensity for disease. Extrinsic factors: diet, drugs, exposure to solar radiation. Those with darker coloured skin (with more melanin) are less sensitive to ultraviolet rays and do not readily show signs of aging. The skin, hair and nails reflect age and hygiene habits, mental state, type of work and education level. Appearance often influences self-concept, may elicit prejudice or negative reactions from other people in a youth-oriented society. People spend lots of money on skin products, surgery etc. to prevent aging signs. This may improve self concept and enhance qol. Through skin we experience touch which allows us to give and receive good and bad feelings and messages (starts @birth) Older people are often deprived of touch.
