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Ex. 9: The Integument

Terms in this set (40)

Epithelial, connective, muscle, nerve
What are the 4 types of tissue?
dermis and epidermis
What are the two major layers of the skin?
epidermis
What layer is the top, superficial layer and composed of 4 sub-layers?
Stratum Corneum
What is the top layer, contains scaly remains of dead epithelial cells?
keratin
Dead cells contain a protein residue
keratin
a water-repellant material
stratum lucidum
thin/translucent layer
stratum Granulosum
darkly stained layer
stratum Spinosum
Multilayered
Stratum Basale
What is the bottom layer of the stratum Spinosum?
stratum basale
What has all 4 layers of epidermis originate here and columnar cells help produce new cells that move upward through the epidermis?
stratum basale
Where are melanocytes located?
melanocytes
produce melanin to produce skin color
dermis
What is A.K.A the "true skin", varies in thickness, highly vascular, provides nourishment for epidermis and consists of 2 sub-layers?
papillary layer
top layer of dermis
dermal papilla
numerous projections within papillary layer
these projections form fingerprints and helps to improve friction on hands and feet
What does the dermal papilla form and help with?
reticular layer
consists of collagenous fiber which gives it strength, bottom layer of dermis
hypodermis
provides attachment to underlying structures (muscles), "third" layer of dermis
dermis
Where are all of the hair structures located in?
pili
a single piece of hair and keratinized cells that are compactly, cemented together
hair follicle
a tube of epithelial cells that hair grows up through
root/bulb
enlarged end of a piece of hair
hair papilla/follicular
located within the root/bulb and contains nerves and blood vessels which provide nourishment for the hair
internal and external root sheaths
encases the root of each piece of hair
Arrector pili muscle
What causes hair to stand up, common with "goose bumps", smooth muscle tissue, runs diagonally from the bottom of the hair follicle to the bottom of the epidermis and assists in secretion of sebum?
oily secretion
What is sebum?
sebaceous gland
What surrounds hair follicle and produces and secretes sebum?
Sebum is secreted into the hair follicle where it _______ to the surface of the skin and keeps hair pliable, waterproofs and ____________
travels up, moistens the skin
eccrine sweat gland
smaller of the sweat glands, empty directly out to surface of the skin, simple tube-like structure with bottom coiled portion deep in the dermis, widely distributed throughout the body and has clear, watery secretion exits through pores?
eccrine sweat gland
What is activated by emotions and temperature?
palms and axillae
Where are the emotional eccrine sweat glands located?
forehead, neck, back
Where are the temperature eccrine sweat glands located?
apocrine sweat glands
Larger of the sweat glands, bottom, coiled portion is located in subcutaneous tissue, empties secretion into the hair follicle, secretion is a thick, gray white or yellowish substance, contains malodorous substances (bacteria) = B.O., and activated by emotions
axillae, genital area, external ear canal and nasal passages
Where are the apocrine sweat glands located?
Meissner's corpuscle
located in the upper portion of the papillary layer and receptor of touch
Pacinian corpuscle
located in deep in the reticular layer of the dermis, receptor of pressure- "ouch!" and layered like onion
1st degree
Appearance: Dermis
Causes: Sunburn, Hitting a burner
First Aid: Cool water, aloe, cold shower
2nd degree
Appearance: Dermis and Epidermis
Causes: Sunburn, Boiling water, Holding onto a burner for a long time, Electrical, Fire
First Aid: Keep it clean, loose bandage (no fuzzy, cotton balls), cool water
3rd degree
Appearance: Hypodermis
Causes: Severe fire, chemical, electrical, boiling water
First Aid: Call 911
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