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Chapter 6 Wordbytes
1. Cut- = skin2. Derm- = skin3. Epi- = upon4. Follic- = small bag5. Hypo- = under/below6. Kerat- = horn7. Melan- = black8. Pil- = hair9. Seb- = grease10. Sub- = under
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Unit 3
The Skinny of Skin: Integumentary System
Essential question: What is the purpose of the structures that
make up our "skin-deep beauty"?
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InformationLearning Target: I will identify the basic parts of the integumentary system and explain the purpose of the Integumentary system Aim: What is skin made of and what is it good for?
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InformationReal-World Connection: Your skin!
Vocabulary: integumentary system, epidermis, dermis, hypodermis, subcutaneous layer, pore, sweat gland, sebaceous (oil) gland, arrector pili, blood vessel, nerve, adipose tissue, hair follicle
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Your skin!The skin is an organ system called
integumentary system
Facts:Makes up 16% of total body weightLargest organ system of body
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Parts of skin systemParts of Integumentary System:1. Skin2. Hair3. Nails4. Sweat glands5. Oil glands
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Functions of skinFunction of Skin:
1) Control body temperatureStructures in the Skin that do this Function
Sweat glandsExample of this Function
sweating
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Functions of skinFunction of Skin:2) Protecting body from physical and chemical damageStructures in the Skin that do this Function
Dermis and epidermisExample of this Function
Skin being shield between outside world and internal organs
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Functions of skinFunction of Skin:
3) Producing Vitamin D to make strong bonesStructures in the Skin that do this Function
epidermisExample of this Function Skin exposed to sunlight produces Vitamin D helps our blood absorb more calcium from our food
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Functions of skinFunction of Skin:
4) Feel pain, pressure, and temperatureStructures in the Skin that do this Function
Nerve tissueExample of this Function
When you touch something, nerves of skin sense environment
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Parts of skinThe skin is made
of three layers:1. Epidermis
a. Upper epidermisb. Lower epidermis
2. Dermis3. Hypodermis
(subcutaneous layer)
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epidermisStructure:
Epidermis
Made up of
Living cells & dead cells
Function
Protect tissue and organs underneath from damage
Prefix/Suffix
Epi = uponDerm = skin
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upper epidermisStructure:
Upper Epidermis
Made up of
Dead flattened skin cells; keratin
Function
protects the living cells underneath from bacteria, heat and chemicals.
Prefix/Suffix
Epi = uponDerm = skin(Upper epidermis = outer outer skin)
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Lower epidermisStructure:
Lower Epidermis
Made up of
Living cells; melanin
Function
(1)To replace the dead cells in upper epidermis
(2)Protect skin from sun damage
Prefix/Suffix
Epi = uponDerm = skin(Lower epidermis = lower outer skin)
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dermisStructure:
Dermis
Made up of
Collagen & elastic fibers
Function(1)Support epidermis(2)Hold organs like
blood vessels, nerves endings, hair follicles and oil and sweat glands.
Prefix/Suffix
Derm = skin
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hypodermisStructure:
Hypodermis (subcutaneous layer)
Made up of
Adipose (fat) tissue
Function
Stores fat
Prefix/Suffix
Hypo = under, belowsub = underCut = skin
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more parts: PORES
.Structure:
poresMade up Of
Tiny openings on top of skin with sweat & oil glandsFunction
Let sweat and oil come out of skin
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Sweat gland
.Structure:
Sweat glandMade up Of
tubulesFunction
Cool surface of skin to decrease body temperature
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Oil gland
.Structure:
Oil glandMade up Of
Fats & proteinsFunction
(1)Protect body against germs(2)Prevent hair and skin from drying
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Arrector pili
.Structure:
Arrector piliMade up Of
Muscles attached to hairFunctionmakes the hair on a person’s arm stand up to keep them warmer
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Blood vessel
.Structure:
Blood vesselsMade up Of
Arteries and veinsFunction
provide nutrients to the skin and help regulate body temperature
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nerve
.Structure:
nerveMade up Of
Sensory receptorsFunction
Sense change and detect information about outside environment
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Adipose tissue
.Structure:
Adipose tissueMade up Of
fatFunction(1) insulate the body from heat and cold (2) provides protective padding (3) an energy storage area
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Hair follicle
.Structure:
Hair follicleMade up Of
hairFunction(1) regulating body temperature (2) providing protection from injury (3) increase sensation (4) produce hair