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Chapter 5
N/A
23
Anatomy
Undergraduate 1
09/17/2011

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Term
Skin-cutaneous membrane
Definition
-protection
-body temp
-vitamin D
-sensation
-excretion
Term
Epidermis
Definition
Keritonized Stratified Squamous, epithelial tissue, thinner
Term
Dermis
Definition
Connective tissue, thicker layer, made of upper papillary and lower reticular layer
Term
Hypodermis
Definition
subcutaneous layer, underneath dermis, loose areolar and adipose connective tissue
Term
Stratum Basale
Definition
single layer of cuboidal or columnar cells
Term
Stratum Spinosum
Definition
8 to 10 layers of many sided cells
Term
Stratum Granulosm
Definition
2 to 5 layers of diamond shaped cells
Term
Stratum Lucidum
Definition
several layers of dead cells with indistinct boundaries
Term
Stratum Corneum
Definition
25 or more layers of dead squamous cells
Term
keritinocytes
Definition
keratin
Term
melanocytes
Definition
melanin
Term
langerhan cells
Definition
immune cells
Term
Thick skin
Definition
all 5 layers, hairless
Term
Thin skin
Definition
stratum lucidum is absent, only 4 layers, all body except palms, palmar surfaces or digits and soles
Term
Skin color
Definition
melanin is produced by melanocytes, tyrosine-> dopaquinone, hair color determined genetically
Term
Albinism
Definition
due to recessive gene, an inability to produce tyrosine,
Term
Carotene
Definition
yellow pigment, cyanosis is caused by a decrease in blood flow
Term
Epidermal ridges
Definition
ridges on the skin where sweat pores open
Term
dermal papillae
Definition
fingerprints
Term
Hair
Definition
grows inside a hair follicle, root expanded to form a bulb. Inside hair bulb is undifferentiated epithelial cells, the matrix. Hair in cross section consist of cuticle, cortex, and medulla. Associated with each hair follicle are smooth muscle called arrector pili.
Term
Sweat glands
Definition
Merocrine sweat glands are simple, coiled tubular glands. Sweat is mostly water but also contain some slat, urea, uric acid, and ammonia.
Term
Apocrine Sweat glands
Definition
open into hair follicle. There are found in the axilla, and genitalia. They become active at puberty.
Term
Sebaceous gland
Definition
are alveolar glands that produce sebum. They are classified as holocrine glands
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