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Chapter 5 Integumentary System
Skin
40
Anatomy
Undergraduate 1
06/30/2009

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Term
Epidermis
Definition
the stratified squamous epithelium 1st layer
Term
Dermis
Definition
the 2nd layer of the skin
Term
Hypodermis
Definition
subcutaneous layer - connects the skin to underlying orgnas
Term
Keratinocyes
Definition
most abundant cells in the epidermis
Term
Melanocytes
Definition
are pigment cells found deep in the epidermis
Term
Merkel Cells
Definition
sensory cells
Term
Lanerhans Cells
Definition
are fixed macrophages
Term
Epidermal Layers
Definition
5 layers
Stratum Corneum
Stratum Ludicium
Stratum Granulosum
Stratum Stratum Spinosum
Stratum Germinativum (stratum basale)
Term
Stratum Luncidum
Definition
found in the epidermis of the palms, fingertips and soles of feet
Term
Stratum Spinosum
Definition
contain melanocytes, merkel and langerhans cells
Term
Exocrine Glands
Definition
secrete their products through ducts to the surface of the skin
Assist in thermoregulation
Excrete wastes
Lubricate epidermis
Term
Sebaceous Gland
Definition
Secrete oily lipid that coats hair shaft and epidermis
Provice lubricaiton and antibacterial action
Term
Apocrine Sweat Glands
Definition
axillae, groin, nipples
influenced by hormones
Term
Mammary glands
Definition
apocrine glands specialized ofr milk production
Term
Merocrine sweat glands
Definition
controlled by nervous system
thermoregulation and extreation
Term
What are the Integument Functions
Definition

Protection

Prevention of Wate Loss

Temperature Regulation

Metabolic Regulation

Immune Defense

Sensory Reception

Excretion by Means of Secretion

Term
Langerhans Cells
Definition
immune cells act by phagocytizing pathogens that have pentrated the epidermis and also against epidermal cancer cells
Term
What are the accessory organs of the integument
Definition

Nails

Hair

Sweat Glands

Sebaceous Glands

Term
Integument
Definition
composed of eipdermis and dermis
Term
Fingernails
Definition
formed from stratm corneum
Term
Integument
Definition
composed of epidermis and dermis
Term
fingernails
Definition
formed from stratum corneum
Term
keratin
Definition
fibrous protein in the epidermis
Term
tactile cells
Definition
receptors for touch
Term
melanocytes
Definition
pigment forming cells
Term
keratinocytes
Definition
most numerous epidermal cell
Term
epidermal dendritic cell
Definition
a phagocytic cell (active in immune response)
Term
subcutaneous layer
Definition
layer deep to dermis
Term
reticular layer
Definition
dense irregular connective tissue
Term
arrector pili
Definition
smooth muscle attached to hair follicle
Term
"Strawberry colored birthmarks" are also called
Definition
capillary hemangiomas
Term
The layer of the epidermis in which cells begin the process of keratinization is the
Definition
stratum granulosum
Term
The sweat glands that communicate with skin surfaces only in the axillary, areolar, pubic, and anal regions are
Definition
apocrine glands
Term
Which layer contains areolar CT and dermal papillae
Definition
papillary layer
Term
Melanin
Definition
a pigment that accumulates inside keratinocytes
Term
The layer of squamous epithelium that forms by the seventh week of development to give rise to the integument is
Definition
periderm
Term
The cells in a hair follicle that are responsible for forming hair are
Definition
matrix cells
Term
Which epidermal cell type is responsible for detecting touch sensations
Definition
tactile cell
Term
Water loss due to evaporation of interstitial fluid through the surface of the skin is termed
Definition
insensible perspiration
Term
Two types of glands originate from the stratum basale of the epidermis
Definition
Sebaceous and Sweat Gland
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