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Ch. 7 Integumentary

Hole's Anatomy Chapter 7 Integumentary System

Epidermis Outer layer of skin
Dermis Middle Layer of skin thicker than the
Basement Membrane Seperates Dermis and Epidermis
Subcutaneous Layer Deepest layer of skinContains Most major blood vessels of skin
Keratinization when strands of tough fibrous waterproof keratin proteins are synthesized and stored within a cell.
Calluses/ Corns Increased thickness of skin where layers are often rubbed away.
Stratum Corneum Outtermost layer of epidermis Made of layers of keratinized dead cells that are flattened and nonnucleated
Stratum Lucidum Between Stratum Corneum and Stratum granulosum on soles and palms Appear Clear nuclei organelles and cell membranes are no longer visible
Stratum Granulosum Beneath stratum corneum3-5 layers of flattened granular cells that contain shrunken fibers of keratin and shriveled nuclei
Stratum Spinosum Beneath Stratum GranulosumMany Layers of cells with centrally located large oval nuclei and developing fibers of keratin cells becoming flattened
Stratum Basale Deepest Layer Single row of cuboidal or columnar cells that divide and growincludes melanocytes
Melanocytes Pigmented cells
Cytocrine Secretion Process of melanocytes sharing pigment with epithelial cells through their extensions
Hair Follicle tubelike depression that hair grows from
Hair Root Portion of hair embedded in skin
Eumelanin brownish black melanocytes
Pheomelanin redish yellow melanocytes
Albanism Condition of lacking melanin altogether
Nails Protective coverings on the end of fingers and toes
Nail Bed Surface layer of skin
Nail Plate Overlays Nail bed
Lunula Whitish thickened have moon shaped region of nail
Sebaceous Glands Holocrine glands that produce globules of a fatty material that accumulate, swelling and bursting of cellsKeep hair soft pliable and waterproofNear or connected to hair follicles
Sebum mix of cellular debris and fatty material
Sweat Glands glands that secreat sweat
Eccrine Glands Assist in body coolingUsed as part of Excretory function
Appocrine Glands Secrete fluid and have a scent do to skin bacteria Activated at puberty
Radiation Infared heat rays escape from warmer surfaces to cooler surroundings
Convection Continual circulation of air over a warm surface
Evapoation Sweat released fluid evaporates and carries heat away from skin cooling
Hypothermia Lower than normal body temperature
Hyperthermia Increased body temperature higher than normal
UV Lights darken skin may cause cancer
Cyanosis oxygen in blood concentration is lowered and skin looks bluish
Inflamation normal response to injury or stress
Growth factors Stimulate certain cells to divide
Scar darker connective tissue left after a cut
First Degree Burn only burnt through first layer of skin
Second degree Burn Burnt through dermis
Third Degree Burn Burnt through all layers of skin
Created by: Kjg11



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