Studied by 20 peopleAnagen
Actively growing phase of the hair; the follicle produces new cells and pushes them up the hair shaft as they become incorporated into the structure of the hair.
Medulla
Appears as if a small explosion occurred in the middle of the hair and may be found singly or in multiples.
Pigment granules
________ are found in the cortex and are dispersed variably throughout the cortex.
Follicle
The structure within which hairs grow; it is a roughly cylindrical tube with a larger pit at the bottom.
Cortical Fusi
Small bubbles that may appear in the cortex; when they do appear, they may be sparse, aggregated or evenly distributed throughout the cortex.
Subshield Stricture
A narrowing of the hair to slightly less than the normal, nonshield shaft diameter.
Vibrissa
The technical term for whiskers, the short to long, stiff, often white hairs around the snout and muzzle.
Keratin
A tough protein- based material from which hair, nails, and horns are made in animals.
Pili Annulati
Hairs with colored rings.
Accuracy
Proportion of true results.
Root
The portion that formerly was in the follicle, the proximal most portion of the hair.
Ovoid Bodies
Odd structures that look like very large pigment granules.
Precision
Proportion of true positives against all positive results.
Monilethrix
Makes hairs look like a string of beads.
Pheomelanin
Lighter pigment.
Specificity
True negative rate.
Imbricate
Human scale pattern.
Melanocytes
Specialized cells in the follicle producing small colored granules that give hairs their particular color.
Pili Torti
Monilethrix makes hairs look like a string of beads.
Catagen
Transitional phase of the hair; the follicle begins to shut down production of cells, the cells begin to shrink, and the root condenses into a bulb-shaped structure called a root bulb or a club root.
Cortex
Consists of spindle-shaped cells (fusiform) that contain or constrain numerous other structures.
Eumelanin
Dark brown pigment.
Hairs
A particular structure common only to mammals; they are the fibrous growths that originate from their skin.
Cuticle
A series of overlapping layers of scales that form a protective covering.
Scissor cut hair
________ has a clean, straight border, whereas razor-cut hair is angled.
Fur Hairs
Thinner and softer which fill in the rest of the coat providing warmth and bulk.
Hairs
A particular structure common only to mammals; they are the fibrous growths that originate from their skin
Keratinization
the hardening process of hair growth
Pili Arrector
Hair muscles
Anagen
Actively growing phase of the hair; the follicle produces new cells and pushes them up the hair shaft as they become incorporated into the structure of the hair
Melanocytes
Specialized cells in the follicle producing small colored granules that give hairs their particular color
Telogen Phase
the resting phase for the follicle
Shaft
The main portion of the hair
Tip
The distal most portion of the hair
Cuticle
A series of overlapping layers of scales that form a protective covering
Imbricate
Human scale pattern
Cortex
Consists of spindle-shaped cells (fusiform) that contain or constrain numerous other structures
Cortical Fusi
Small bubbles that may appear in the cortex; when they do appear, they may be sparse, aggregated or evenly distributed throughout the cortex
Ovoid Bodies
Odd structures that look like very large pigment granules
Medulla
Appears as if a small explosion occurred in the middle of the hair and may be found singly or in multiples
Guard Hairs
Large, stiff hairs that make up the outer part of the animals coat
Transitional Body Hairs
Hairs that do not fit into these categories; such as those on the stomach, between the chest and the pubic region
Buckling
an abrupt change in direction of the hair shaft with or without a slight twist
Shouldering
an asymmetrical cross section of hairs
Sensitivity
True positive rate
Specificity
True negative rate
Negative predictive value (NPV)
Proportion of true negatives against all negative results
Accuracy
Proportion of true results
Note 
Flashcard (22)