Answers Graded A+
What does the integumentary system consist of? - Correct answer-skin, hair, nails,
sweat glands, sebaceous glands
What are the three layers of the skin? - Correct answer-epidermis, dermis,
hypodermis
What is the epidermis? - Correct answer-outermost layer of skin that is stratified,
squamous, and karatinized
What are desmosomes? - Correct answer-For flexibility, they are held together by
intercellular links
What is keratinization? - Correct answer--causes the new skin cells to put older
ones on the surface, where they change shape and composition (lose water), die,
and are replaced
- it takes 28 days
-slows down as we age as skin holds onto old cells and less collagen and elastin is
produced
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,-sheds outer layer
What are the five epithelial layers? - Correct answer-Stratum coreum, Stratum
lucidum, Stratum granulosum, Stratum spinosum, Stratum germinativum
stratum corneum - Correct answer--outermost layer of epidermis
-leathery & horny
-keratinization
stratum lucidum - Correct answer-Clear, transparent layer of the epidermis under
the stratum corneum.
stratum granulosum - Correct answer--Consists of 2 - 3 layers of flattened cells
-very active in keratinization
stratum spinosum - Correct answer--a layer of the epidermis that provides strength
and flexibility to the skin
-spiny / prickly
-7 layers
stratum germinativum - Correct answer--Deepest, live layer of the epidermis that
produces new epidermal skin cells and is responsible for growth
-mitosis
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, Melanocytes - Correct answer-produce melanin
Melanin - Correct answer-A pigment that gives the skin its colour (black people
have more / white people have less / albino people have none)
Dermis - Correct answer--Inner layer of skin
- "true skin"
- dense tissue (tough collagenous fibres & yellow elastin)
What are some structures of the dermis - Correct answer-hair, sweat glands,
sebaceous glands, nerves, and blood vessels
papillary layer - Correct answer-Outermost layer of the dermis, directly underneath
the epidermis
Reticullar layer - Correct answer-Between papillary layer & subcutaneous (hyper
dermis) layers
Hypodermis (subcutaneous) - Correct answer-the layer of skin beneath the dermis,
which serves as a storage repository for fat
cyanosis - Correct answer-a bluish discoloration of the skin resulting from poor
circulation or inadequate oxygenation of the blood.
Cuticle (Hair) - Correct answer-tough, clear outside covering of the hair shaft
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