dear educators and students, would love to share with you a supportive presentation about skin. I claim that it would be helpful for you especially for those who like simple. I hope that is beneficial to you !

1. WHAT DO YOU KNOW
ABOUT YOUR SKIN ?
BIOLOGY
Integumentary System

2. Section 1:The Integumentary System
(Page 947-951)
Essential Questions
1.What are the four tissue types that are found in the
integumentary system?
2.What are the functions of the integumentary
system?
3.What are the two layers of skin composed of?
4.What are the events that occur when skin is
repaired?

3. Section 1:The Integumentary System
What do you think
integumentary system is?
The students are discussing their ideas
?

4. The integumentary system is the
organ system that protects the body
from various kinds of damage, such
as loss of water or abrasion from
outside.
Section 1:The Integumentary System

5. Possible Points of Discussion
Identify the organs of
the system
Infer, skin is an organ
Describe the
composition of the skin
Summarize the
importance of different
tissues of the skin

6. Identify the organs of
the system
Skin hair Nails
Infer, skin is an organ
Consists of different types of
tissues joined together for a
specific purpose

7. A. Human Skin
Describe the
composition of the skin
Summarize the
importance of different
tissues of the skin
Epithelial tissue
Connective tissue
Muscle
Nerves
•Covers the body
surfaces
•Body movement
•Form body’s
communication network
• Provide support
and protection

8. Virtual lab
https://bluegrass.kctcs.edu/education-
training/programs/biology/bio_137_virtual_lab/

9. Compare and contrast the structures
of the skin
Skin main layers
Epidermis
The outer
superficial
layer of skin
Consists of
epithelial cells
10-30 cells
thick
Two layers ?
Dermis
The second
layer of the
skin
15-40 times
thicker than
epidermis
Consists of 7
structures

10. Epidermis
The outer superficial layer of skin
Contains
keratin
Outer
layer Contains
melanin
Cells
continually
divides by
mitosis
Inner
layer

11. A protein that
protects the cells
and tissues that lie
underneath
a pigment that provides
protection from UV
radiation by absorbing
light energy
The skin color is
influenced by the amount
of melanin produced

12. Dermis
The Second layer of the skin

13. Connective
tissue
- Protects from tearing
- Enables the skin to
return to its normal state
after being stretched
Nerve
cells
Subcutane
ous layer
A layer of connective
tissue that stores fat and
helps the body retain
heat
Muscle
fibers
Oil gland
Sweat
gland
Dermis
The Second layer of the skin
Hair
follicle

14. Check point
What causes acne ?
What do you think the role of nerve cells,
muscle fibres, sweat glands and sebaceous
gland in the skin?

15. How much of skin cells can be lost each month?
The students are discussing their ideas
?
Possible Points of Discussion
How do you think the skin will respond to
suntan ?
“KERATIN is dead cells”, what do you
think?

16. Skin structure activity

17. Skin structure activity AK

18. B. Hair and nails
They develop from epithelial cells and
contain keratin

19. NAILS grow about 0.5 -1.2 mm/day
Older cells are compacted and pushed out
NAILS

20. Hair
What is the role of
sebaceous gland ?

21. Myth or fact ?!
This is a myth :
Cells surrounding the nails
and hair cells dehydrate
causing the cells to shrink
and pull away from nails
and hair.
This makes both appear
longer

22. Functions of the skin
Summarize the
functions of the
skin using any
resource

23. What we call this ?

25. Functions of the skin
Temperature
regulation
• Hot
weather
• Cold
weather
/frightened
Vitamin
production
• Vitamin d
importance
Protection
• Microbes
Senses
Such as
Pain ,
pressure
https://www.youtube.com/watch?v=OxPlCkTKhzY

26. What are the natural sources of vitamin D?
The students are discussing their ideas
?
Possible Points of Discussion
What is the proper form of vitamin D as a
tablet ?
Do you think that vitamin D is good for
immunity? Explain
Do you think that vit D would help
preventing COVID-19?

31. What happens when we get older?

32. Damage of the skin
Cuts and scrapes
Effect of the sun
and burns
Skin cancer

33. Cases from the hospital
A 9 year old boy weighing 48 kgs and Ht. 135 cms,
sustained burns today while playing with matches in a
garage. Unknown accelerant and his pants caught on fire,
which he attempted to put out using his hands. He
sustained burns on both lower extremities. The burns are
circumferential on the right lower extremity extending
from the ankle to the midthigh and anteriorly on the left
thigh. He also has burns to both hands, palmer surfaces.
1. Describe components of the initial assessment for this
patient.
BURNS

34. Cases from the hospital
A male Saudi patient, 50 years old was admitted to the Plastic
Surgery Unit at Dammam Central Hospital (DCH), complaining of a
swelling in the plantar aspect of the left foot near the heads of
the metatarsals. The swelling was of about 2 years duration
gradually increasing in size. It was a firm brownish swelling
measuring 2 cm × 1.5 cm, with no bleeding or ulceration. He was
treated at health centers and clinics by chemical cauterization for
what was diagnosed as a corn but with no improvement.
In view of the history and previous treatments, Two to three
mitoses were seen per high power field. The cells were large with
pleomorphic, hyperchromatic nuclei with prominent nucleoli and
moderate amount of cytoplasm. Intracellular melanin pigment
was seen in large area
SKIN CANCER

35. Cases from the hospital
Mrs W was an active 90-year-old woman who lived at
home on her own in a small seaside town. She was self-
caring with no close family, but she did have a network of
good friends and neighbours who helped her with
shopping and odd jobs around the house. However, on 23
October 2009, she was admitted to a community hospital
from home. She had a wound on the sole of her right foot
of unknown aetiology, and cellulitis with erythema and
swelling up to below the knee. Mrs W could give no clear
explanation as to how the wound had occurred, but
complained of some discomfort. Her only recollection was
that she had put her foot into her slipper and felt a sharp
pain.
CUTS AND SCRAPES

36. CUTS AND SCRAPES

37. CUTS AND SCRAPES

38. CUTS AND SCRAPES
https://www.youtube.com/watch?v=4e7evinsfm0

39. BURNS

41. BURNS
https://www.youtube.com/watch?v=EaJmzB8YgS0

42. SKIN CANCER

43. SKIN CANCER

44. UVA and UVB CAN make it through the atmosphere in tact,
and both can be harmful to your skin, including increasing
your risk of developing skin cancer.
UVA radiation, made up of rays with the longest ultraviolet
wavelength, penetrates deepest: into the cells of the dermis.
UVA is what gives people a tan (excepting those with lighter
skin, who simply burn). It also causes premature aging and
suppresses the immune system. UVA also alters the DNA of
skin cells in the dermis, making it more difficult for your
body to fight off cancer-causing changes.
UVB radiation has a shorter wave length and doesn’t
penetrate as deeply into your skin, but can cause more
direct tissue damage. Overexposure to UVB rays causes
sunburns and damages the epidermis—the visible top
layer of the skin. UVB intensity varies geographically, and
may be more or less intense depending on the season
and time of day.
UVB rays cause sunburns, which may damage and alter
the DNA of skin cells, significantly increasing the risk of
skin cancer.
SKIN CANCER
Tanning is Never Completely Safe
Unfortunately, any exposure to ultraviolet radiation—whether
from the sun or from a tanning bed—will damage the skin and
increase risk of skin cancer.
The good news: there are several effective ways to protect
your skin from the sun and mitigate the risk of developing skin
cancer:
Avoid exposure to the sun between 10 a.m. and 4 p.m.
Wear sunglasses
Wear hats
Wear clothing that covers your arms, shoulders, neck, and legs
Wear sunscreen
https://treatcancer.com/blog/how-the-su
damages-skin/