Warm – up
8/24-25/2015
- Essentials: Interactive Notebooks, Quiz Sheets, Test
- Warm-Up:
I.
II.
I. Go over test and questions missed, reflect on your progress in the
class. Come up with 2 goals and questions for yourself and Ms. Hervey.
II. Answer question on following page
Agenda
 SWBAT: SWBAT explain the purpose of the integumentary system,
the types of membranes, and the layers of the skin
 Homework: Test Corrections
Announcements:
• Test Corrections due Friday
• Quiz
Unit 1
Reflection
1.
What is the most important takeaway you
have from this past unit? What will you still
remember in 2-4 years?
2.
How did your performance on this test
compare to how you expected to do?
3.
What did you do well in preparation for this
test? Did you do anything different from how
you studied for the quizzes? What can you still
improve upon for next test?
4.
What study skills did you utilize in preparing
for this test? Which were most effective?
5.
What did Ms. Hervey do well to prepare you?
6.
What can Ms. Hervey do differently to prepare
you?
 Correct Answer
 Why it is correct
Test
Corrections
 You will receive half points lost
 I.e = 80% on test, complete test
corrections
 20pts lost = 10 pts gain
 NEW GRADE 90%
I. Warm
Up
1. What type of cells make up
the outermost layer of our
skin?
2. Why do we have skin? List 2
purposes that you can come
up with…
3. List 3 components of the
Integumentary system
4. What are the integumentary
accessory organs and how do
they function
QUIZ 5
Before we
get started…
Why is it important to learn
about the integumentary
system? Write 2 things in your
notes that would be helpful to
know about this body system
 Epi-
A few
definitions…
PREFIX
upon, on top of
 Hypo- PREFIX
under
 Derm- PREFIX
skin
 Membrane- A thin layer of tissue that
covers surfaces or separates regions,
structures, or organs of an animal or a
plant
 Keratin – protein that strengthens the
epidermis
4 different types:
Insane in the
membrane
1. Serous membranes =
line body cavities that
are not open to the
surface.
WHY? Keeps things in
place, lubricates
Example: A serous
membrane lines the
abdominal cavity.
2. Mucous membranes =
Line body cavities that
open to the surface.
Insane in the
membrane
WHY? Lubricates, traps
and prevents the entry
of objects.
Examples: Mucous
membranes line the
nasal, oral, digestive,
urinary, and
reproductive cavities.
3. Synovial membranes=
line the joints
Insane in the
membrane
WHY? Produces fluids
to lubricate the joints
Examples: Synovial
membranes can be
found in your knees and
shoulders.
4. Cutaneous
membranes= skin
Insane in the
membrane
WHY? (see next
section)
Example: Your skin is a
cutaneous membrane
composed of stratified
squamous epithelial
cells & connective
tissue
Please
identify what
type of
membrane
would be used
for each of
these
purposes:
CFU
1. Keep my joints from grinding
into each other
2. Protect my body from bacteria
entering through the nose.
3. Keep my lungs from jamming
into my ribs
4. Keep out bacteria from entering
through the surface
5. Produce snot
 Keep my joints from grinding into each
other
 Synovial membrane
 Protect my body from bacteria entering
through the nose.
 Mucous membrane
Answers…
 Keep my lungs from jamming into my
ribs
 Serous membrane
 Keep out bacteria from entering through
the surface
 Cutaneous membrane
 Produce snot
 Mucous membrane
So Why do
we have
skin??
1. protective covering
2. regulates body
temperature
3. prevents water loss
4. Houses sensory
receptors
5. synthesizes various
biochemicals (vitamin D)
So Why do
we have
skin??
1. protective covering
2. regulates body
temperature
3. prevents water loss
4. Houses sensory
receptors
5. synthesizes various
biochemicals
(vitamin D)
Layers of the
Cutaneous
Membrane
Epidermis : top layer
made of stratified
squamous epithelial
cells.
Used for protection.
Indents of it make
hair and nails
No blood vessels
Come Let’s Get Sun Burned
MAKE UP YOUR OWN ACRONYM
Most superficial
5 Layers of
the
Epidermis
Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum basale
Most deep
Stratum
corneum
 Top layer of skin
 20-30 layers of dead, keratinized
cells
 Provide a barrier due to thickened
surface
Stratum
lucidum
 Only found in “thick skin” (palms of
hands/soles of feet)
Stratum
granulosum
 Where keratinization begins
 Cells fill up with keratin cell starts
to die
Stratum
spinosum
 Contain keratinocytes – most
abundant cell type in epidermis
 Contain immune cells that help fight
infection
Stratum
basale
 Deepest layer of the epidermis
 Contain keratinocytes
 Contain melanocytes – produce
melanin which affects skin color
 Contain tactile cells – sensitive to
touch and provide sensory signals to
brain
 Thick skin is only found on your palms, soles of feet,
and tips of fingers and toes
Thick vs. Thin
Skin
 Contains all 5 layers of epidermis
 Does not contain hair follicles
 Thin skin is found everywhere else
 Contains only 4 layers (no stratum lucidum)
 All people have
about the same
number of
melanocytes
Skin Color
 But, melanocyte
activity and color
of melanin varies
 UV light
stimulates
melanocytes to
make more
melanin
http://bcove.me/vtksufbw
Freckles
 Freckles
represent an
increase in
melanocyte
activity
 Most commonly known as fingerprints
 Found on the fingers, palms, soles, and
toes
Friction
Ridges
 Due to folds in dermis and epidermis
 Increase friction so we can better grasp
objects and possibly increase skin’s
flexibility
 Each individual has a unique pattern of
friction ridges
https://www.youtube.com/watch?v=qX6hFXH
Dmk4
https://quizlet.com/9075746
8/flashcards
Create a
Visual
Diagram of
the Layers of
the
Epidermis
 Leave room for more layers to be
added below and structures
within/to the side
 Include all 5 layers and label
 Include definitions and example(s) of each
Homework
 Test Corrections and flashcards.
 These cards may be used on the test.