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Exam 3
Skin
22
Anatomy
Undergraduate 1
10/21/2009

Additional Anatomy Flashcards

 


 

Cards

Term
Integumentary System
Definition
Composed of skin, hair, oil, nails, sweat glands, sensory receptors
Term
Dermatology
Definition
is the medical specialty that deals with diagnosis and treatment of integumentary disorders
Term
Skin
Definition

-largest organ

-also called cutaneous membrane or integument

-2 main parts-epidermis(epithelial); dermis(connective tissue)

 

Term
Dermis
Definition

-Deeper thicker connective tissue

 

Term
Hypodermis/ subcutaneous (subQ) layer
Definition

-Deep to dermis but not part of the skin

-consists of areolar andadipose tissues

-contains nerve endings that are sensitive to pressure cld pacinian(lamellated) corpuscles

Term
Epidermis
Definition

-composed of keratinized stratified squamos epithelium

-4 types of cells:keratinocytes 90%, melanocytes 8%, langerhans cells, merkel cells

Term
Keratinocytes (hornlike cells)
Definition

keratin, fibrous proteins, protects skin, underlying tissues from heat, microbes, and chemicals

-produce lamellar granules-water-repellent  sealant

Term
melanocytes(black)
Definition

-produce the pigment melanin

-contributes color

-absorbs damaging uv rays or light

-susceptible to damage by uv light

 

Term
Langerhans cells
Definition

-arise from red bone marrow

-help other cells recognize the invading microbe and destroy it.

Term
Merkel Cells
Definition

-lease numerous

-located in deepest layer of the epidermis

-detect touch sensations merkel disc flattened process of a sensory neuron

Term
Merkel
Definition
Term
thin skin
Definition
stratum basale, stratum spinosum, stratum granulosum, thin stratum corneum
Term
thick skin
Definition

palms, soles

-srtaum basale, stratum spinosum, stratum granulosum, stratum lucidum, thick stratum corneum

Term
stratum basale
Definition

most inner layer

-made up of 1 or 2 layers

-stem cells

-also known as the stratum germinativum

 

Term
Stratum spinosum
Definition

-superficial to the strautum basale

-spiny, arranged in 8-10 layers of keratinocytes

-langerhans and melanocytes present

Term
stratum granulosum
Definition

keratinocytes that are undegoing apoptosis(cells dying)

-Granules of keratin

Term
stratum lucidum
Definition

-fingertips palms and soles

-dead keratinocytes w large amounts of keratin

Term
stratum corneum(horny)
Definition

25-30 dead keratinocyte layers

-contain mostly keratin

Term
dermis
Definition

composed of strong connective tissue containing collagen and elastic fibers

-2 regions; papillary & reticular

Term
papillary region
Definition
consists of areolar connective containing thin collagen & fine elastic fibers
Term
reticular region
Definition

-dense irregular connective tissue

-extensibility & elasticity

-attached to the subcutaneous layer

Term
thermoreglation
Definition

-liberating sweat & adjusting the flow of blood

-homostatic regulation of body temperature

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