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Integumentary System
A&P Module 1-B
42
Anatomy
Undergraduate 2
02/04/2016

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Term
Integument
Definition
structures that cover the exposed surfaces of the body
Term
Structures that make up the integument:
Definition
skin
auxiliary appendages
Term
Auxiliary appendages include:
Definition
hair
nails
sebaceous glands
sweat glands
ceruminous glands
nerve endings
Term
Melanin/Pigment
Definition
protein that absorbs UV light to give coloration to body structures
Term
The skin connects to:
Definition
mucous membranes where it joins body cavities
Term
Skin color is the result of:
Definition
melanin and the amount of blood near the surface of the skin
Term
Functions of skin:
Definition
provides a mechanical barrier
houses nerve endings
regulates body temp
excretes waste materials
helps maintain electrolyte balance
Term
Epidermis:
Definition
Outermost layer, consisting of stratified squamous epithelial tissue
NONSENSITIVE
Term
Dermis:
Definition
thick, vascular
SENSITIVE
contains the auxiliary appendages of the skin
Term
Dermal-epidermal junction:
Definition
A polysaccharide gel with fibrous structures that serve as a cement to hold the layers of skin together
Term
Hypodermis:
Definition
Layer of areolar tissue and fat that lies beneath the dermis
ALSO CALLED:
SUBCUTANEOUS LAYER
SUBCUTANEOUS FASCIA
SUPERFICIAL FASCIA
Term
Corneum:
Definition
Latin term for "horn"
Term
Granulosum:
latin
Definition
Latin term for "granular"
Term
Keratin:
Definition
A fibrous, sulfur-containing protein that is the primary component of the epidermis, hair, nails, and enamel of teeth
Term
Stratum:
latin
Definition
Latin term for layer
Term
Stratum corneum:
Definition
The outermost layer of the epidermis where dead cells have been converted into keratin that continually flakes off
Term
Papilla:
Definition
A protrusion that extends into the epidermal area
Term
Papillary layer:
Definition
Outer layer of the dermis that lies next to the basal layer of the epidermis and is patterned with papillae and hollows
Term
Reticular layer:
Definition
The inner layer of the dermis that forms a network of interlacing cells and fibers
Term
Auxiliary appendage:
Definition
A formation of specialized cells within the skin that performs a particular function
Term
Follicle:
Definition
A tube that extends from the dermis through the epidermis and to the surface of the skin
Term
Sebum:
Definition
The oily secretion of the sebaceous glands of the skin; composed of keratin, fat, and cellular debris
Term
Hair grows from:
Definition
a follicle in the skin
Term
A hair consists of a part that protrudes from the skin called:
Definition
the shaft
Term
Subdermal section of the hair:
Definition
the root
Term
Nails consist of:
That have been converted to:
Definition
epidermal cells
keratin
Term
Nails grow from:
Lying under the:
Definition
epithelial cells
lunula
Term
Sweat gland:
Definition
located in the deep layers of the dermis with a duct that exits through a pore in the epidermis; the gland consists of a coiled tube surrounded by capillaries
Term
Sweat glands help to:
Definition
maintain homeostasis
excrete nitrogenous wastes
Term
Types of nerve endings in the skin:
Definition
Touch
Pressure
Heat
Cold
Pain
Term
Decubitus ulcer:
Definition
Pressure sore; frequently found on the sacrum, elbows, heels
Term
Furnucle:
Definition
Inflammation/infection of the dermis caused by bacteria entering the skin through a follicle
also called a BOIL
Term
Vesicle:
Definition
A blister
Term
Nodule:
Definition
A small, solid, irregularly shaped cluster of cells
Term
Polyp:
Definition
Growth that extends into the lumen of a mucous membrane or appears on the skin
Term
Pustule:
Definition
Elevation of skin filled with pus
Term
Cyst:
Definition
A sac that contains any fluid except pus
Term
Fissure:
Definition
A cleft or groove in the skin or tissue
Term
Ulcer:
Definition
A loss of substance on a cutaneous or mucous surface
Term
Paronychia:
Definition
Infection of the fold of skin at the margin of the nail
Term
Onycholysis:
Definition
Nail separating from nail bed, usually caused by stress to long nails
Term
Keratin:
Definition
hard protein material
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