Forensic Science Chapter 5: Hair Flashcards
Terms : Hide Images [1]
| 9344224246 | Cuticle | outside covering of hair shaft made of overlapping scales (A in the image) |  | 0 |
| 9344224247 | Cortex | Middle layer of hair made of keratin and embedded with melanin pigment (B in the image) | | 1 |
| 9344224248 | Medulla | Innermost layer of hair shaft running down the center (C in the image) | | 2 |
| 9344231480 | Medullary Index | A characteristic of hair determined by measuring the diameter of the medulla and dividing it by the diameter of the hair. | 3 | |
| 9344231481 | Medullary Index for Humans | Less than 1/3 (the medulla is thin compared to the rest of the hair shaft) | 4 | |
| 9344233712 | Medullary Index for Animals | Greater than 1/2 (the medulla is thick compared to the rest of the hair shaft) | 5 | |
| 9344237984 | Frizzy or "kinky" hair texture | Type of hair resulting from a crescent-moon shaped hair shaft | 6 | |
| 9344237985 | Straight hair | Type of hair texture resulting from a round hair shaft |  | 7 |
| 9344242560 | Anagen | Period of active hair growth in a follicle (up to 5 years) | 8 | |
| 9344242561 | Catagen | Period where hair is not growing (resting phase) | 9 | |
| 9344242562 | Telogen | Period where hair follicle is getting ready to push the hair out (final phase of the hair) | 10 | |
| 9344246361 | Melanin | brown pigment that gives hair its color (people with less of the pigment have a lighter hair color) | 11 | |
| 9344246362 | Follicle | The cells in the skin that surround the root of a hair and the site of new hair growth |  | 12 |
| 9344246363 | Hair root | 13 | ||
| 9344249811 | Nuclear DNA | type of DNA only found in living cells (hair follicle). | 14 | |
| 9344249812 | Mitochondrial DNA | type of DNA found in the hair shaft that is very expensive to analyze. It is inherited from the mother only. | 15 | |
| 9344249813 | Dyed hair | 16 | ||
| 9344249814 | Bleached hair | 17 | ||
| 9344254162 | Hair collection | 18 | ||
| 9344256265 | Curly or wavy hair texture | 19 | ||
| 9344256266 | Continuous medulla | The pattern shown in the image |  | 20 |
| 9344269706 | Interrupted medulla | The pattern shown in the image |  | 21 |
| 9344284535 | From hair, one can determine... | whether the hair is human or animal, sometimes race, whether the hair was forcibly removed, if the hair has been treated with chemicals, if drugs have been ingested | 22 | |
| 9344341097 | Hair shaft | The visible part of hair that is composed of 3 layers: the cuticle, cortex, and medulla |  | 23 |
| 9344360537 | Fragmentary medulla | The pattern shown in the image |  | 24 |
| 9344417794 | Stacked medulla | The pattern shown in the image |  | 25 |
| 9344491068 | Growth rate for hair | 1 cm/month | 26 | |
| 9344543928 | Hair that fell out naturally | What type of hair is this, based on the shape of the follicle? |  | 27 |
| 9344549974 | Hair that was pulled out | What type of hair is this, based on the shape of the follicle? |  | 28 |