1. The Integumentary System
Chapter 3: Membranes and the Integumentary System
Lesson 3.2
The Integumentary System

2. Functions of the Integumentary System
protects against
abrasion
chemical damage
drying out
UV radiation damage
regulates body temperature

3. Functions of the Integumentary System

4. Anatomy of the Skin
epidermis
dermis
hypodermis

5. Layers of the Epidermis

6. Review and Assessment True or False?
1. The dermis is the superficial layer of the skin.
2. The skin helps regulate body temperature.
3. The epidermis has three layers.
4. The hypodermis is above the dermis.
5. The skin protects against UV radiation.

7. Epidermal Cells keratinocytes epidermal dendritic cells Merkel cells
makes keratin, form layers of epidermis
epidermal dendritic cells
ward off infections
Merkel cells
touch receptors

8. Dermis dense, fibrous connective tissue papillary layer
forms fingerprints
reticular layer

9. Hypodermis fibrous connective tissue adipose tissue padding insulation
energy storage

10. Appendages of the Skin sudoriferous (sweat) glands sebaceous glands
eccrine
apocrine
sebaceous glands
hair
nails

11. Review and Assessment
Fill in the blanks with: hypodermis, keratinocytes, sweat, or papillary.
1. Eccrine is a type of _______________ gland.
2. _______________ produce keratin.
3. Adipose tissue is found in the _______________.
4. The _______________ of the dermis forms fingerprints.

12. Hair Follicle

13. Hair basics Shape of follicle = hair texture Color based on melanin
Straight = round
Wavy = oval
flat = curly
Color based on melanin
(eumelanin, pheomelanin)
The Truth about Gingers!

14. Nail

15. Injuries and Disorders of the Skin
Chapter 3: Membranes and the Integumentary System
Lesson 3.3
Injuries and Disorders of the Skin

16. Injuries of the Skin decubitus ulcers burns bedsores
caused by restricted blood supply
burns
first-, second- or third-degree
caused by heat, chemicals, electricity or UV radiation
Suzanne Tucker/Shutterstock.com, JTeffects/Shutterstock.com, Naiyyer/Shutterstock.com

17. Name that Burn

18. This Burn!

19. That Burn!

20. Rule of 9’s 9% for both anterior/posterior of head/neck
18% for anterior and 18% of posterior of torso
9% for a/p of EACH arm
18% for a/p of EACH leg
1% groin region
Adds up to 100%

21. Problem
Smokey Susie fell asleep in bed with a bottle of Jack, which spilled all over her, then was ignited with her cigar. She had burns on her anterior and posterior right arm, entire head/neck, anterior torso, as well as anterior right leg. How badly was Susie singed?
Answer: = 45%

22. Grafting of Skin Split-thickness skin graft
2 top layers of from epidermis, & dermis
Graft from hidden donor site
Held with a dressing, staples, small stitches.
Covered 3 to 5 days.

23. © Goodheart-Willcox Co., Inc.

24. Infections of the Skin and Membranes
viral infections
herpes varicella
herpes zoster
herpes simplex virus type 1 or type 2
human papillomavirus
warts
Maksym Bondarchuk/Shutterstock.com

25. Infections of the Skin and Membranes
fungal infections
athlete’s foot
jock itch
ringworm
toenail fungus
bacterial infections
Impetigo – staph infection
cellulitis

26. Inflammatory Conditions of the Skin
psoriasis
involves redness and irritation
Kenxro/Shutterstock.com

27. Cancers of the Skin basal cell carcinoma squamous cell carcinoma
Most common, most curable (grows slow)
Overproducing cells in stratum basale
squamous cell carcinoma
Grows quickly, can spread
Spiny layer

28. Cancers of the Skin malignant melanoma ABCD rule Most serious
Fleshy, colored, irregular
ABCD rule
Normal mole

29. Skin Part TWO