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properties of hair

Ch. 11 Properties and disorders of the Hair and Scalp

TermDefinition
alopecia the technical term for hair loss
alopecia arerata the sudden falling out if hair in patches or spots
alopecia prematura hair loss that occurs before middle age
alopecia senilis hair loss occurring in old age
alopecia syphilitica Hair loss as a result of syphilis
amino acids the building blocks or units of structure in protein
anagen phase growth phase in the hair cycle
androgenic alopecia hair loss that occurs as a result of genetics, age, and hormonal changes; male pattern baldness
arrector pili involuntary muscle fiber attached to the follicle
canities technical term for grey hair
carbuncle the result of an acute, deep-seated bacterial infection in the subcutaneous tissue
catagen phase transition phase of the hair growth cycle
cortex middle layer of the hair
cowlick tuft of hair that stands straight up
cuticle outermost layer of the hair shaft
dermal papilla small, coned-shaped elevation located at the base of the hair follicle that fits into the hair bulb
disulfide bond aka sulfur bond; a type of chemical cross bond found in the cortex
end bonds aka peptide bonds; chemical bonds that join amino acids end to end
eumelanin melanin that gives brown and black color to hair
follice tubelike depression in the skin that contains the hair root
folliculitis barbae aka barber's itch; bacterial infection of the hair follicles with inflamed pustules in the bearded areas.
furnucle acute bacterial infection of the hair follicle, producing constant pain. aka boil
hair bulb club-shaped structure that forms the lower part of the hair root
hair density the amount of hair per square inch of scalp
hair elasicity the ability of the hair to stretch and return to its original length
hair porosity the ability for the hair to absorb moisture
hair root the part of the hair that is encased in the hair follicle
hair shaft the part of the hair that extends beyond the skin
hair stream hair that flows in the same direction
hair texture measures the diameter of the hair strand. fine, medium, coarse.
hydrogen bond a physical side bond in the hair cortex
hypertrichosis a condition of abnormal hair growth
keratin the protein of which hair is formed
lanugo vellus hair
malassezia fungus that causes dandruff
medulla center of the hair shaft
pediculosis captis head lice
peptide bonds end bonds; chemical bonds that join amino acids end to end
pheomelanin melanin that gives red to blonde color to hair
pityriasis capitis simplex dry dandruff type
pityriasis steatoides waxy/greasy dandruff type
polypeptide chain long chain of amino acids linked by peptide bonds
primary terminal hair short, thick hairs that grow on the eyebrows and lashes
pseudofolliculitis barbrae chronic inflammatory form of folliculitis known as "razor bumps" resembling folliculitis papules and pustules; generally accepted to be caused by ingrown hairs
salt bond a physical side bond within the hair cortex
secondary terminal hair long hair found on the scalp, beard, chest, back and legs
side bonds aka cross bonds; hydrogen, salt and sulfur bonds in the cortex
sycosis vulgaris chronic bacterial infection of the bearded areas of the face
telogen phase resting phase of the hair growth cycle
tinea technical term for ringworm
tinea capitis ringworm of the scalp
tinea favosa ringworm characterized by dry, sulfur-yellow crusts on the scalp
tinea sycosis ringworm of the bearded areas on the face
trichology the science of dealing with the hair, its diseases, and its care
vellus soft, downy hair that apprears on the body
wave pattern amount of movement in the hair strand. straight, wavy, curly, and coiled
whorl hair that grows in a circular pattern
Created by: BSPittsburgh
 

 



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