Chapter 6 Wordbytes 1. Cut- = skin 2. Derm- = skin 3. Epi- = upon 4. Follic- = small bag 5. Hypo- =...
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Transcript of Chapter 6 Wordbytes 1. Cut- = skin 2. Derm- = skin 3. Epi- = upon 4. Follic- = small bag 5. Hypo- =...
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
Unit 3
The Skinny of Skin: Integumentary System
Essential question: What is the purpose of the structures that
make up our "skin-deep beauty"?
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?
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
Your skin!The skin is an organ system called
integumentary system
Facts:Makes up 16% of total body weightLargest organ system of body
Parts of skin systemParts of Integumentary System:1. Skin2. Hair3. Nails4. Sweat glands5. Oil glands
Functions of skinFunction of Skin:
1) Control body temperatureStructures in the Skin that do this Function
Sweat glandsExample of this Function
sweating
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
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
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
Parts of skinThe skin is made
of three layers:1. Epidermis
a. Upper epidermisb. Lower epidermis
2. Dermis3. Hypodermis
(subcutaneous layer)
epidermisStructure:
Epidermis
Made up of
Living cells & dead cells
Function
Protect tissue and organs underneath from damage
Prefix/Suffix
Epi = uponDerm = skin
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)
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)
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
hypodermisStructure:
Hypodermis (subcutaneous layer)
Made up of
Adipose (fat) tissue
Function
Stores fat
Prefix/Suffix
Hypo = under, belowsub = underCut = skin
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
Sweat gland
.Structure:
Sweat glandMade up Of
tubulesFunction
Cool surface of skin to decrease body temperature
Oil gland
.Structure:
Oil glandMade up Of
Fats & proteinsFunction
(1)Protect body against germs(2)Prevent hair and skin from drying
Arrector pili
.Structure:
Arrector piliMade up Of
Muscles attached to hairFunctionmakes the hair on a person’s arm stand up to keep them warmer
Blood vessel
.Structure:
Blood vesselsMade up Of
Arteries and veinsFunction
provide nutrients to the skin and help regulate body temperature
nerve
.Structure:
nerveMade up Of
Sensory receptorsFunction
Sense change and detect information about outside environment
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
Hair follicle
.Structure:
Hair follicleMade up Of
hairFunction(1) regulating body temperature (2) providing protection from injury (3) increase sensation (4) produce hair