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The Integumentary System
Chapter 12
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Overview of Structures, Combining Forms, and Functions of the Integumentary System
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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
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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)
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The Skin
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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
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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
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Click Here to play Skin animation
The Skin Click Here to play Skin animation
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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
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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
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Structures of the Fingernails and Toenails
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Click Here to play Burns animation
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Key Word Parts and Definitions
cutane/o skin derm/o, dermat/o hidr/o sweat hirsut/o hairy, rough (continues)
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Key Word Parts and Definitions
kerat/o horny, hard lip/o fat, lipid melan/o black, dark myc/o fungus (continues)
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Key Word Parts and Definitions
onych/o fingernail or toenail pil/i, pil/o hair py/o pus rhytid/o wrinkle (continues)
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Key Word Parts and Definitions
seb/o sebum urtic/o rash, hives xer/o dry
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Questions
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Question A human being sheds a complete layer of skin every 4 months.
True or False?
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Answer False. A human sheds a complete layer of skin every 4 weeks.
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Question Each square inch of human skin consists of how many feet of blood vessels? 10 20 2
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Answer b. 20
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Question Ulcers can occur on the skin as well as within the body.
True or False?
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Answer True. An ulcer is an open lesion of the skin or mucous membrane.
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Question The most common form of skin cancer is: melanoma
basal cell carcinoma squamous cell carcinoma
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Answer b. Basal cell carcinoma is the most common, but least harmful, type of skin cancer.
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Answers to Learning Exercises
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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
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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
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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
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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
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Chapter 12 Answers Term Selection 12.46. granuloma 12.47. pediculosis
erythema scales carbuncle Sentence Completion purulent onychomycosis gangrene albinism urticaria
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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
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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
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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
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