Skin Model - Lab Review
About this set
Created by:
robswatski Teacher on March 13, 2010
Subjects:
anatomy, physiology, skin, integumentary system, biology
Description:
This flashcard set reviews the structures of the skin as seen on a lab model. I hope you find it helpful in your study of the integumentary system. All lab model photographs by Rob Swatski (2010). Visit my iTunes U site for Anatomy podcasts and PDF files of all of my anatomy photo visual guides! htt (see more)
Classes:
HSTESAUTech, General Biology 102, 《GRE核心词汇考法精析》学习小组, Anatomy and Physiology LDSBC, Anatomy / Physio, Integumentary System (Skin) (see more)
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Terms | Definitions |
|---|---|
 epidermis |  the superficial, thinner layer of skin, composed of keratinized stratified squamous epithelium |
| dermis |  a layer of dense irregular connective tissue lying deep to the epidermis |
| subcutaneous layer |  a continuous sheet of areolar connective tissue and adipose tissue between the dermis of the skin and the deep fascia of the muscles |
| stratum basale |  the deepest layer of the epidermis consisting of stem cells capable of undergoing cell division to form new cells |
| stratum spinosum |  a layer of the epidermis that provides strength and flexibility to the skin |
| stratum granulosum |  a layer of the epidermis that marks the transition between the deeper, metabolically active strata and the dead cells of the more superficial strata |
| stratum lucidum |  a layer of the epidermis found only in the thick skin of the fingers, palms, and soles |
| stratum corneum |  the most superficial layer of the epidermis consisting of dead cells |
| dermal papillae |  a fingerlike projection of the dermis that may contain blood capillaries or Meissner corpuscles (of touch) |
| hair follicle |  a structure composed of epithelium that surrounds the root of a hair |
| shaft |  the superficial portion of the hair |
| root |  the portion of a hair that penetrates into the dermis and sometimes the subcutaneous layer |
| external root sheath |  a downward continuation of the epidermis that surrounds the root of the hair |
| internal root sheath |  a covering of epithelium produced by the matrix that surrounds the root of the hair |
| bulb |  the base of a hair follicle and its surrounding dermal root sheath, containing the papilla of the hair and matrix |
| papilla of the hair |  a nipple-shaped indentation which contains areolar connective tissue and many blood vessels that nourish the growing hair follicle |
| hair matrix |  a germinal layer of cells responsible for the growth of existing hairs and the production of new hairs when old hairs are shed |
| sebaceous gland |  an exocrine gland in the dermis associated with a hair follicle that secretes oil |
| arrector pili |  a smooth muscle attached to hair follicles that causes "goose bumps" to appear on the skin when contracted |
| pacinian corpuscle |  a type of nerve ending located in the subcutaneous layer that is sensitive to pressure; also described as "lamellated" |
| free nerve ending |  dendrites that lack any obvious structural specialization; used to generate sensations of warmth, coolness, pain, tickle, and itch |
| Meissner corpuscle |  a tactile nerve ending receptor in the dermal papillae that is sensitive to touch |
| apocrine sudoriferous gland |  found in the skin of the axilla, groin, and areolae; secretes a viscous, lipid- and protein-rich product into a hair follicle upon stimulation during emotional distress or sexual excitement |
| eccrine sudoriferous gland |  found throughout the skin of most regions of the body, especially in skin of forehead, palms, and soles; secretes a less viscous product consisting of water, ions, urea, and ammonia; regulates body temperature and removal of metabolic wastes |
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