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37 Cards in this Set
- Front
- Back
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What fundamental requirements of hair are provided by the circulatory system |
Nourishment |
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What do sebaceous glands provide for the hair |
Lubrication or oil |
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Name three causes for unhealthy hair |
Malnutrition neglect or blood circulation disease disorder of the sebaceous glands and chemical irritation |
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Define hair |
A thread like appendage of the skin tapered to the same point at the free end |
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What is the study of hair |
Trichology |
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Whereupon the body is short hair found |
Eyebrows, eyelashes |
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What is the name of the hair which has no medulla layer |
Lanugo (peach fuzz) |
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Name the three layers of the hair |
Cuticle, cortex and medulla |
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Which layer of hair is referred to as the Central Health pith player |
Medulla |
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What is the shape of the cell in the cortex layer |
Long spindle |
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By what process do hair cells multiply |
Mitosis-indirect |
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Name the three General shapes of hairs |
Oval, flat, round |
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What determines the shape of the hair |
Follicle |
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Name the four lengthwise divisions of the hair |
Bulb,root, Shaft, point |
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Over what does the hair bulb fit |
Papilla |
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The funnel-shaped depression in the skin containing the hair root is called what |
Follicle |
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How many sebaceous glands are attached to each follicle |
1 to 6 |
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What is the name of the muscle attached to the follicle |
Arrector pili |
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What nourishes the papilla |
Blood |
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What nourishes the bulb |
The papilla |
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What is the productive Oregon of the hair |
Papilla |
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What is the average number of hairs on the head |
120,000 |
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In what layer of the hair are pigment grains found |
Cortex |
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What is the coloring matter of the hair |
Melanin |
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What percent of the hair is carbon |
50% |
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What percent of the hair in Sulphur |
5% |
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What is the chief ingredient of hair |
Keratin |
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What is the average length to which men's hair will grow |
12" to 16" |
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How far can healthy hair be stretched |
1/5 to 1/8 its length |
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What is the average lifespan of the scalp hair |
4 years |
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How long does it take a new hair to grow from the papilla to the surface of the scalp |
41 to 72 days |
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What is the monthly rate of growth of scalp hair |
3/8" to 3/4" |
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After shedding how long does it take for a new hair to begin to form over the papilla |
21 to 42 days |
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What is the average number of hair shed daily |
50 to 80 |
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What does porosity city of hair mean |
It has pores or spaces through which it can absorb moisture |
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What is meant by Hydroscopic ability of hair |
Ability of hair to absorb moisture makes a hydroscopic |
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What chemical will make hair more Hydroscopic |
Peroxide |
