Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Integumentary System
Hair and Nails
| Question | Answer |
|---|---|
| pili (hair) -L- | flexible strands produced by ahir follicles. consist of dead keratinized cells. - functions as protection, sensation and warmth |
| shaft | region of hair which projects from skin. determines if hair is curly or straight |
| root | region of hair that is embedded in skin |
| hair layers | medulla, cortex and cuticle |
| medulla | central core of hair, has large cells and air spaces |
| cortex (hair) -L- | bulky layer that surrounds medulla,- is pigmented. - has several layers of flattened cells |
| cuticle -L- | outermost layer of hair, has a single row of cells that overlap. most heavily keratinized part of the hair which provides strength |
| hair pigment | made by melanocytes at the base of hair follicle. different colors come from different portions of melanins |
| hair follicle | surrounds the hairs. located in the epidermis down to the dermis - |
| hair bulb | deep end of hair follicle with hair follicle receptors wrapped around |
| hair follicle receptor | AKA root hair plexus |
| hair follicle receptor | wraps around hair bulbs, receptor that is stimulated when the hair is bent |
| hair papilla -L- | dermal tissue that protrudes into the hair bulb. has capillaries that supplies nutrients to growing and and signals hair to grow |
| wall of hair follicle (laterial to medial) | connective tissue root sheath, glassy membrane, external epithelial root sheath, internale epithelial root sheath |
| hair matrix cells -L- | epithelial cells at base of the follicle that divide to produce new hair |
| hair bulge | where cells of the hair matrix originate |
| arrector pilli -L- | bundle of smooth muscle cells that can pull hair follicle into an upright position and dimple skin surface in response to cold temperatures or fear |
| vellus hair | body hair that is fine and pale, found on children and adult women |
| terminal hair | coarser, longer hair of the eyebrows and scalp |
| hirsutism | excessive hairiness |
| alopecia | hair thinning, when hairs are not replaced as fast as they shed |
| male pattern baldness | genetically determined, follicle growth cycles become so short that the hairs never emerge from follicles before shedding |
| nail -L- | scalelike modification of the epidermis that forms a clear protective covering over finger/toe. contains hard keratin |
| regions of nail(distal to proximal) -L- | free edge, body, root |
| nail bed -L- | the epidermis below the nail body |
| nail matrix -L- | thickest proximal portion of nail bed that is responsible for nail growth |
| lunula -L- | region that lies over the nail matrix that appears as a white crescent |
| nail folds | skin folds that are overlapping the sides and proximal portion of nail |
| cuticle (nail) -L- | proximal nail fold that projects onto the nail body |
| hyponychium | region beneath the free edge of nail (where dirt accumulates) |
| hair follicle components | external root sheeth (derived from dermis) - glassy (basement) membrane. - internale root sheath, derived from the epidermis |
Created by:
karin.thompson
Popular Anatomy sets