2-4-13
DSQ 42A
 Clean Notes
 Color Muscular & Digestive System on sheet
 Correct & Assign CH

A 83-70
B 69-63
C 62-53
D 52-45
F 44-0
OBJ


To understand the main function of the skin system
To understand the main parts of the skin system
Integumentary System
or Skin System
Test Friday, February 8th or
Monday, February 11th
Main Functions of the Skin System
 The
 The
skin covers and protects the body
skin regulates your body temperature
and keeps dirt and germs out
Main Parts of the Skin System
Skin
 Hair
 Nails

The Body’s Covering system is made up of the skin,
hair, and nails
Skin- The outside covering of your body
 Largest Organ in your body
2-5-13

DSQ 42B-Quiz Questions
REVIEW


Main Functions of the Skin System
Main Parts of the Skin System
OBJ
 To understand what the epidermis is
 To understand the dermis
 To draw/color/trace the layers of skin
Epidermis & Dermis
Two parts of the Skin are:
 Dermis
 Epidermis
Epidermis
 Epidermis-
outer or top skin layer----you
can see & touch it
 Epi-
means ‘upon or over’
Dermis
 Dermis-
Inner skin layer below the
epidermis---you CANNOT see it
 Dermis-
means ‘skin’
Skin Diagram
In your notes
 Draw or trace a
diagram of the skin
 Make sure it is done in
Color
Your drawing needs the following
epidermis, dermis, nerve,
blood vessels, gland, pore
You may copy/use from
our packet, this picture,
or one from the flip books
2-6-13
DSQ QUIZ-correct
 Check drawings—have out
 CH due Friday, February 8th
REVIEW
 Main Function of Skin System
 Main Parts of the Skin System
 2 Layers of Skin

OBJ
 Understand Epidermis & Dermis
Epidermis Facts







Less than a millimeter thick
Has a waterproof substance that keeps water from soaking
in
Keeps water from evaporating out
Water proof substance acts as a guard to keep dirt, germs,
and chemicals out
Cells at bottom are alive---top cells are dead
Body cells and tissue are made of mostly water
Cells at the top are dead—they rub off new cells replace
old. Dead skin cells make dust you see in your house. Yes
your ‘boogers’ are dead skin cells getting caught in your
nose hairs when you breathe—GROSS!!! But that’s life!
DERMIS
 Much
thicker than the epidermis
 3 millimeters thick
 Made of all living cells
 Nerves & blood vessels are located in the
dermis
 Hair roots & some glands are in the dermis
Glands & Pores

Glands- Special groups of cells which
produce & store substances
Example-oil gland-release oily liquid which keeps the
skin soft and smooth

Pores small openings in the skin that release
sweat & oil
2-7-13
DSQ 42A
 CH due Friday, February 8th
REVIEW
 Main Function of the Skin System
 Main Parts of the Skin System
 Epidermis Facts
 Dermis Facts
OBJ






Name Two ways the body cools itself
Pigment---what it does for the skin
How you Care for the skin
Assign 1 WS-due tomorrow
Test-Monday, February 11th
How the Skin Helps keep the body
cool
 Sweat
is one way the body cools itself
 The other way is when the body becomes
too warm, the blood vessels in the dermis
expand or get larger. More blood flows to
the skin. The red is caused by expanded
blood vessels and this increases blood flow.
As blood flows to the skin, body heat in the
blood leaves through the skin.
Pigment
 Pigment-
the substance in the dermis that
gives the skin color
How does pigment protect the skin? It keeps
the sun rays from damaging the body
tissues
An animal with little or no pigment……
albino

Ways to Protect the Skin
Exercise
Eat
Healthy
Sleep
Bathing
2-8-13
DSQ 42B
 Correct WS
 Correct & Assign CH
REVIEW
 Main Function of the Skin System
 Main Parts of the Skin System
 Epidermis Facts
 Dermis Facts
 Name Two ways the body cools itself
OBJ
 Assign 1 WS-due 11:40 & 1:20
 Preview the test
 CH due Wednesday, February 13th
 Test, Monday, February 11th
