The Form and Structure of Hair (pgs. 110-114)



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Name: _______________________ Date: _________ Period:__________

The Form and Structure of Hair (pgs. 110-114)





  1. Another name for the form and structure of something is its ______________.

  2. In a 24hour period, the average person sheds ____ hairs from the scalp alone.

  3. Label the parts of the hair shaft pictured here.

  4. A _________________ is the organ out of which a hair shaft grows.

  5. Why is analyzing hair useful for drugs and poisons?



  6. Match the following descriptions of the parts of a hair shaft.
    _____ cortex a. spongy interior core of hair that gives it flexibility; appears as a canal in the middle of
    the shaft
    _____ cuticle b. middle layer of the hair shaft that provides strength; comprises most of the hair mass
    _____ medulla c. tough, clear outside covering of the hair shaft

  7. What is unique about the cuticle of human hair?


  8. Identify the origin of the hair shafts pictured here.
    _____ Human hair
    _____ Mouse
    _____ Cat

  9. Why does human hair have a characteristic odor when it burns?


  10. The protein of which hair is made is __________________.

  11. Label the longitudinal diagram of the hair shaft below.
    _____ Cortical fusi
    _____ Cortex
    _____ Pigment granules
    _____ Medulla
    _____ Cuticle scales

  12. Pigment that makes hair black, brown, red or yellow is found in the ___________________.




  1. Distinguish the medulla patterns in the diagram below.
    _____ Continuous (human)
    _____ Continuous (animal)
    _____ Fragmentary
    _____ Interrupted
    _____ Stacked

  2. The medulla is normally invisible, except in the hair of which people groups?


  3. What hair shapes are generally found among these people groups?
    African peoples:
    Whites, Mexicans, and Middle Eastern peoples:
    Asians and Native American peoples:

  4. Head hair, on average grows ________ cm per month.

  5. Put the threes stages of growth of hair into chronological order (telogen, catagen, anagen).


  6. The stage of hair growth that lasts up to five years is the ______________ phase.

  7. Hairs found on a hair brush are normally from the __________________ phase.

  8. Match the hair end description with a condition that would explain it.
    ____ Squared off at the tip A. mature human hair
    ____ Rounded at the base B. use of harsh chemicals, or overuse of a blow dryer
    ____ Tapers to a point C. recently cut
    ____ Frayed or split ends D. uncut for a period of time

  9. List three reasons how a pencil can be a useful analogy for a hair shaft.

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