Download Function of Skin - Moore Public Schools

Information
Real-World Connection:
Your skin!
Vocabulary: integumentary system,
epidermis, dermis, hypodermis, subcutaneous
layer, Pore, Sweat Gland, Sebaceous (oil)
gland, Erector Pilli, Blood vessel, Nerve,
Adipose tissue (fat molecule), Hair follicle
Your skin!
 The skin is an organ system called
integumentary system
 Facts:
 Makes up 16% of total body weight
 Largest organ system of body
Parts of skin system
 Parts of Integumentary System:
1. Skin
2. Hair
3. Nails
4. Sweat glands
5. Oil glands
Functions of skin
Function of Skin:
1) Control body temperature
Structures in the Skin that do this Function
Sweat glands
Example of this Function
sweating
Functions of skin
Function of Skin:
2) Protecting body from physical and chemical
damage
Structures in the Skin that do this Function
Dermis and epidermis
Example of this Function
Skin being shield between outside world and
internal organs
Functions of skin
Function of Skin:
3) Producing Vitamin D to make strong bones
Structures in the Skin that do this Function
epidermis
Example of this Function
Skin exposed to sunlight  produces Vitamin D 
helps our blood absorb more calcium from our
food
Functions of skin
Function of Skin:
4) Feel pain, pressure, and temperature
Structures in the Skin that do this Function
Nerve tissue
Example of this Function
When you touch something, nerves of skin sense
environment
Parts of skin
 The skin is made of
three layers:
1. Epidermis
a.
b.
Upper epidermis
Lower epidermis
2. Dermis
3. Hypodermis
(subcutaneous
layer)
epidermis
Structure:
Made up of
Epidermis
Living cells & dead cells
Function
Prefix/Suffix
Protect tissue and
Epi = outer
organs underneath from Dermis = skin
damage
upper epidermis
Structure:
Made up of
Upper Epidermis
Function
Dead flattened skin
cells; keratin
Prefix/Suffix
protects the living cells
underneath from
bacteria, heat and
chemicals.
Epi = outer
Dermis = skin
(Upper epidermis =
outer outer skin)
Lower epidermis
Structure:
Made up of
Lower Epidermis
Living cells; melanin
Function
Prefix/Suffix
(1) To replace the dead
cells in upper
epidermis
(2) Protect skin from sun
damage
Epi = outer
Dermis = skin
(Lower epidermis =
lower outer skin)
dermis
Structure:
Made up of
Dermis
Collagen & elastic fibers
Function
Prefix/Suffix
(1) Support epidermis
(2) Hold organs like
Dermis = skin
blood vessels, nerves
endings, hair follicles
and oil and sweat
glands.
hypodermis
Structure:
Made up of
Hypodermis
(subcutaneous layer)
Adipose (fat) tissue
Function
Prefix/Suffix
Stores fat
Hypo = under, below
sub = under
Cutaneous = of the skin
Pores—more parts
Structure:
.
pores
Made up Of
Tiny openings on top of skin with sweat & oil
glands
Function
Let sweat and oil come out of skin
Sweat gland
Structure:
.
Sweat gland
Made up Of
tubules
Function
Cool surface of skin to decrease body temperature
Oil gland
Structure:
.
Oil gland
Made up Of
Fats & proteins
Function
(1) Protect body against germs
(2) Prevent hair and skin from drying
Erector pilli
Structure:
.
Erector pilli
Made up Of
Muscles attached to hair
Function
makes the hair on a person’s arm stand up to keep
them warmer
Blood vessel
Structure:
.
Blood vessels
Made up Of
Arteries and veins
Function
provide nutrients to the skin and help regulate
body temperature
nerve
Structure:
.
nerve
Made up Of
Sensory receptors
Function
Sense change and detect information about outside
environment
Adipose tissue
Structure:
.
Adipose tissue
Made up Of
fat
Function
(1) insulate the body from heat and cold (2)
provides protective padding (3) an energy storage
area
Hair follicle
Structure:
.
Hair follicle
Made up Of
hair
Function
(1) regulating body temperature (2) providing
protection from injury (3) increase sensation (4)
produce hair