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Chapter 4
The Integumentary System
15
Anatomy
Undergraduate 2
02/20/2010

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Term
subcutaneous tissue just deep to the skin
Definition
Hypodermis (Superficial Fascia)
Term
contains adipose plus some areolar connective tissue
Definition
Superficial Fascia (Hypodermis)
Term
superficial layer of the skin
Definition
Epidermis
Term
contains four cell types and four or five distinct layers-keratinized stratified squamous epithelium
Definition
Epidermis
Term
most abundant in epidermis; produce the fiberous protein that help give the epidermis its protective properties
Definition
keratinocytes/ Keratin
Term
spider shaped epithelial cells that sythesize pigment and found in the deepest layer of the epidermis
Definition
Melanocytes/ Melanin
Term
star-shaped, arise from bone marrowand migrate to the epidermis
Definition
Langerhans cells (epidermal dentritic cells)
Term
ingest foreign substances and are kay activators of our immune system
Definition
Epidermal Dentritic Cells (Langerhans Cells)
Term
occasional are present at the epidermal junction, each is intimately associated with a sensory nerve ending
Definition
Merkel Cells(Tactile cells)
Term
functions as a sensory recpetor for touch
Definition
Tactile or Merkel disc
Term
skin which covers the plams, fingertips, and soles of the feet
layers are:
Stratum basale
Stratum spinsum
Stratum granulosum
Stratum lucidum
Stratum corneum
Definition
Thick Skin
Term
skin in which the stratum lucidum is not present that the other four layers appear to be much thinner,skin which covers the rest of the body
Definition
Thin Skin
Term
deepest epidermal layer acting as the boarder between the dermis and epidermis (a squiggley line which resembles cardboard)
Definition
Stratum Basale
Term
consists of a single row of cells representing the youngest keratinocytes. Occasional Merkel (Tactile) cells are alson seen in this layer.
Definition
Stratum Basale
Term
-several layers thick
-contain weblike intermediate filament system made of keratin bundles; which span their cytosol to attach to desmosomes
-keratin is a bit flattened and irregularly shaped
Definition
Spinosum Layer (Prickly Layer)
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