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Hair Types, Structure and Textural Differences

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Across
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Mature keratin cells in the hair shaft that have lost their nuclei are considered to be made of dead protein
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The sac like structures that provide the follicle with natural oils
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The outer layer of the hair shaft it is made up of dead protein cells keratin as well as amino acids such as cystine and is arranged in overlapping scales like shingles on a roof
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The substance secreted by the sebaceous glands oil glands
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The size of the hair shaft and the individual strands it determines the texture and degrees of coarseness thickness fineness or thinness
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The hairs ability to stretch and return to its original size and shape without breaking
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Pigmented hair found on the scalp arms legs nose and ears this hair is coarser than villus hair although it varies in texture color and length
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Oily or fatty ingredients that coat the hair aid in its elasticity and prevent moisture loss
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The innermost core of the shaft consisting of sponge like baggy cells in very thin light colored hair it may be hollow or not exist at all for the most part the medulla does not require any hair care services
Down
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The process of cells moving upwards inside the follicle maturing and hardening as the cells lose their nuclei and perish
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A small involuntary muscle attached to the underside of a hair follicle fear or cold causes this muscle to contract and makes hair stand up straight giving the skin the appearance of goose bumps
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Short fine white and downy hair usually without a medulla villus hair is found on any area of the body except the palms of hands and soles of feet
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The thickest and innermost layer of the shaft composed of elongated cells this layer contains melanin and is also responsible for the hairs elasticity
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Hair structure beneath the skin surface it is the structure from which the hair grows
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The major elements that make up human hair carbon oxygen hydrogen nitrogen and sulfur
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The transition or resting stage of hair development during this phase after years of growing the hair cells stop reproducing the hair begins to lose moisture and separates from the papilla it is the signal of the end of the growth phase this phase lasts from one to two weeks
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Types of sides bond that accounts for one third of the hairs resilience and strength disulfide bonds join the sulfur atoms in the amino acids to create cystine these bonds are broken only by chemicals solutions thus attesting to their strength
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The natural external form of a hair fiber refers to the straight wavy curly coils kinky or wiry shape of the hair shaft
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The most basic form and general characteristics
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A chain of amino acids that are bonded together to make keratin protein for hair nails and body
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Water binding agents or substances that promote moisture retention
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A type of side bond that is temporary and is easily weakened by strong alkaline or acidic solutions