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Exam 2
bones
22
Anatomy
Undergraduate 1
02/18/2009

Additional Anatomy Flashcards

 


 

Cards

Term
Epidermis
Definition
outermost superficial region
Term
Dermis
Definition
middle region
Term
Hypodermis (superficial fasia)
Definition
deepest region
Term
[image]
Definition
Term
Composed of keratinized stratified squamous Epithelium
Definition
Epidermis
Term
Melanocytes
Definition
produce the brown pigment melanin
Term
Merkel cells
Definition
function as touch receptors in association with sensory nerve endings
Term
Langerhans cells
Definition
epidermal macrophages that help activate the immune system
Term
Layers of the Epidermis::
Stratum Basale (Basal Layer)
Definition
Deepest epidermal layer....
firmly attached to the dermis...
single row of the youngest keratinocytes....
cells undergo rapid division
Term
stratum germination
Definition
germinating layer
Term
Layers of the Epidermis::
Stratum Spinosum( Prickly Layer)
Definition
cells contain a weblike system of intermediate filaments attached to desmosomes.....
Melanin granuales and langerhans cells are abundant in this layer
Term
Stratum Granulosum ( Granular Layer)
Definition
thin layer...
three to five cell layers
Term
Stratum Lucidum (Clear Layer)
Definition
thin, transparent band...
superficial to the stratum granulosum....
consists of a few rows of flat, dead keratinocytes...
present only in thick skin (souls of feet)
Term
Stratum Corneum (Horny Layer)
Definition
outermost layer of keratinized cells...
accounts for three quarters of the epidermal thickness.....
Functions include::::

waterproofing....protection from abrasion and penetration..rendering the body relatively insensitive to biological,chemical,and physical assaults.
Term
Dermis
Definition
second major skin region containing strong, flexible connective tissue
Term
Cell types of the dermis
Definition
fibroblasts...macrophages...mast cells...white blood cells
Term
Dermis is composed of what two layers?
Definition
papillary (projections) and Reticular (network or branchlike)
Term
areolar connective tissue
Definition
part of the papillary layer with collagen and elastic fibers
Term
dermal papillae
Definition
projections on superior surface of the papillary layer
Term
dermal papillae contain..
Definition
capillary loops...meissners corpuscles...free nerve endings
Term
Reticular Layer
Definition
accounts for approximately 80% of the thickness of the skin...collagen fibers add strength and resilency...elastin fibers provide stretch - recoil properties
Term
Hypodermis
Definition
subcutaneous layer deep to the skin...
composed of adipose and areolar connective tissue
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