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Histology

Integument

QuestionAnswer
integument is made up of... skin+skin appendages
examples of skin appendages are... sweat glands, sebaceous glands, hair follicles, nails
functions of skin protection, prevent dehydration, wound healing, temperature regulation, synthesis of vitamin D, sensory reception
all of the appendages are located in this layer of the skin dermis
thick skin is hairless and is located here... palms of hands, soles of feet
thin skin is hairy and is located... everywhere besides palms of hands and soles of feet
thick vs. thin skin has to do with the thickness of this layer of skin... epidermis
name the five layers of the epidermis from bottom to top stratum basale, stratum spinosum, stratum granulposum, stratum lucidum, stratum corneum
organelles of cells start to break down at this layer of skin stratum granulosum
this intracellular junction anchors the stratum basale to the basement membrane... hemidesmosome
this intracellular junction anchors skin cells to each other... spot desmosomes
melanocytes are located in this cell layer stratum basale
basal cell carcinoma occurs from an overgrowth of cells in this skin layer.. stratum basale
melanocytes are derived from this embryologic structure neural crest cells
melanocytes produce this melanin
besides the production of melanin, another funciton of melanocytes is to... transfer melanin granules to keratinocytes
this essential enzyme is needed to produce melanine, and albinos lack this enzyme tyrosinase
true or false...albinos have no melanocytes FALSE. Albinos have melanocytes, they are just not funcional.
this cellular junction in the stratum spinosum holds the skin together desmosome
these are intermediate filaments composed of the protein keratin and attach to desmosomes tonofilaments
these structures are membrane coated granules resleased by cells inthe stratum granulosum. they contain lipids that form a waterproof "teflon coat" on the skin that prevents water loss or excess water absorption lamellar bodies
this layer is a clear, homogenous layer, and is ony present in thick skin and is considered a subdivision of the stratum corneum. stratum lucidum
this layer of skin is mostly composed of keratin and remnants of dead cells. it is several layers thick to provide protection against abrasion and deternmines thick vs. thin skin stratum corneum
these are star shaped cells with a halo found in the stratum spinosum and are derived from monocytes. langerhans cells
these cells are located in the dermal/epidermal jubnction and is thought to be associated with sensory touch sensation merkel cell
the dermis has this type of connection tissue dense irregular
the two layers of the dermis are... papillary and reticular layer
this structure is located in the dermal papillae and is associatd with touch sensation meissner corpuscle
this structure is onion shaped and is a sense organ stimulatd by pressure found in deel layers of skin particularly around finger pads. it responds to vibration and pressure pacinian corpuscle
this is the most numerous gland found in the skin and is a sweat gland. it is found all over the body eccrine sweat gland
this sweat gland is found in "A" regions of the body: axillary, areolar, and anal region, and opens to hair follicles apocrine sweat glands
Created by: aferdo01
 

 



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