1. The Integumentary System
Chapter 12

2. Overview of Structures, Combining Forms, and Functions of the Integumentary System

3. Skin Primary Function Related Word Parts (Combining Forms)
First line of defense for the immune system
Waterproofs the body
Major receptor for the sense of touch
Related Word Parts (Combining Forms)
cutane/o
dermat/o, derm/o

4. The Skin Epidermis: outermost layer of the skin
Dermis: thick layer of living tissue directly below the epidermis
Subcutaneous layer: located just below the layers of the skin and connects skin to surface muscles
(continues)

5. The Skin

6. Sebaceous Glands Primary Function Related Word Parts (Combining Forms)
Secrete sebum (oil) to lubricate the skin
Discourage the growth of bacteria on the skin
Related Word Parts (Combining Forms)
seb/o

7. Sweat Glands Primary Function Related Word Parts (Combining Forms)
Secrete sweat to regulate body temperature and water content
Excrete some metabolic waste
Related Word Parts (Combining Forms)
hidr/o

8. Click Here to play Skin animation
The Skin
Click Here to play Skin animation

9. Hair Primary Function Related Word Parts (Combining Forms)
Aids in controlling the loss of body heat
Related Word Parts (Combining Forms)
pil/i, pil/o

10. Nails Primary Function Related Word Parts (Combining Forms)
Protect the dorsal surface of the last bone of each finger and toe
Related Word Parts (Combining Forms)
onych/o
ungu/o

11. Structures of the Fingernails and Toenails

12. Click Here to play Burns animation

13. Key Word Parts and Definitions
cutane/o
skin
derm/o, dermat/o
hidr/o
sweat
hirsut/o
hairy, rough
(continues)

14. Key Word Parts and Definitions
kerat/o
horny, hard
lip/o
fat, lipid
melan/o
black, dark
myc/o
fungus
(continues)

15. Key Word Parts and Definitions
onych/o
fingernail or toenail
pil/i, pil/o
hair
py/o
pus
rhytid/o
wrinkle
(continues)

16. Key Word Parts and Definitions
seb/o
sebum
urtic/o
rash, hives
xer/o
dry

17. Questions

18. Question A human being sheds a complete layer of skin every 4 months.
True or False?

19. Answer
False. A human sheds a complete layer of skin every 4 weeks.

20. Question
Each square inch of human skin consists of how many feet of blood vessels? 10 20 2

21. Answer
b. 20

22. Question Ulcers can occur on the skin as well as within the body.
True or False?

23. Answer
True. An ulcer is an open lesion of the skin or mucous membrane.

24. Question The most common form of skin cancer is: melanoma
basal cell carcinoma
squamous cell carcinoma

25. Answer
b. Basal cell carcinoma is the most common, but least harmful, type of skin cancer.

26. Answers to Learning Exercises

27. Chapter 12 Answers Matching Word Parts 1 12.1. cutane/o 12.2. urtic/o
12.3. erythr/o
12.4. hidr/o
12.5. rhytid/o
Matching Word Parts 2
12.6. melan/o
12.7. lip/o
12.8. kerat/o
12.9. pedicul/o
dermat/o

28. Chapter 12 Answers Matching Word Parts 3 12.11. xer/o 12.12. myc/o
hirsut/o
onych/o
seb/o
Definitions
cellulitis
dysplastic nevi
alopecia areata
hematoma
diaphoresis
cicatrix
bulla
debridement
second-degree
verrucae

29. Chapter 12 Answers Matching Structures 12.26. keratin 12.27. unguis
sebaceous glands
mammary glands
dermis
Which Word?
onychocryptosis
impetigo
laceration
basal cell
necrotizing fasciitis

30. Chapter 12 Answers Spelling Counts 12.36. psoriasis 12.37. eczema
abscess
onychia
scleroderma
Abbreviation Identification
basal cell carcinoma
irrigation and debridement
systemic lupus erythematosus
malignant melanoma
squamous cell carcinoma

31. Chapter 12 Answers Term Selection 12.46. granuloma 12.47. pediculosis
erythema
scales
carbuncle
Sentence Completion
purulent
onychomycosis
gangrene
albinism
urticaria

32. Chapter 12 Answers Word Surgery 12.56. rhytid, ectomy
onych/o, myc, -osis
follicul, -itis
prurit, us
ichthy, -osis
True/False
True
False
True
False
True

33. Chapter 12 Answers Clinical Conditions 12.66. sclerotherapy
albinism
hematoma
abrasion
petechiae
scabies
Mohs’
blepharoplasty
abscess
sleep hyperhidrosis
Which Is the Correct Medical Term?
paronychia
comedo
psoriasis
koilonychia
nevus

34. Chapter 12 Answers Challenge Word Building 12.81. onychomalacia
hypohidrosis
rhinoplasty
onychoma
melanopathy
onychectomy
anonychia
dermatopathy
mycosis
melanodermatitis
Labeling Exercises
cyst
pustule
vesicle
bulla
ulcer
epidermis
dermis
subcutaneous
sebaceous
sweat