7th Edition Medical Terminology for Health Professions Ann Ehrlich/Carol L.Schroeder © 2013 Delmar, Cengage Learning. All Rights Reserved The Integumentary System Chapter 12

© 2013 Delmar, Cengage Learning. All Rights Reserved Overview of Structures, Combining Forms, and Functions of the Integumentary System

© 2013 Delmar, Cengage Learning. All Rights Reserved Skin Primary Function –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

© 2013 Delmar, Cengage Learning. All Rights Reserved 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)

© 2013 Delmar, Cengage Learning. All Rights Reserved The Skin

© 2013 Delmar, Cengage Learning. All Rights Reserved Sebaceous Glands Primary Function –Secrete sebum (oil) to lubricate the skin –Discourage the growth of bacteria on the skin Related Word Parts (Combining Forms) –seb/o

© 2013 Delmar, Cengage Learning. All Rights Reserved Sweat Glands Primary Function –Secrete sweat to regulate body temperature and water content –Excrete some metabolic waste Related Word Parts (Combining Forms) –hidr/o

© 2013 Delmar, Cengage Learning. All Rights Reserved Hair Primary Function –Aids in controlling the loss of body heat Related Word Parts (Combining Forms) –pil/i, pil/o

© 2013 Delmar, Cengage Learning. All Rights Reserved Nails Primary Function –Protect the dorsal surface of the last bone of each finger and toe Related Word Parts (Combining Forms) –onych/o –ungu/o

© 2013 Delmar, Cengage Learning. All Rights Reserved Structures of the Fingernails and Toenails

© 2013 Delmar, Cengage Learning. All Rights Reserved Key Word Parts and Definitions cutane/o –skin derm/o, dermat/o –skin hidr/o –sweat hirsut/o –hairy, rough (continues)

© 2013 Delmar, Cengage Learning. All Rights Reserved Key Word Parts and Definitions kerat/o –horny, hard lip/o –fat, lipid melan/o –black, dark myc/o –fungus (continues)

© 2013 Delmar, Cengage Learning. All Rights Reserved Key Word Parts and Definitions onych/o –fingernail or toenail pil/i, pil/o –hair py/o –pus rhytid/o –wrinkle (continues)

© 2013 Delmar, Cengage Learning. All Rights Reserved Key Word Parts and Definitions seb/o –sebum urtic/o –rash, hives xer/o –dry

© 2013 Delmar, Cengage Learning. All Rights Reserved Questions

© 2013 Delmar, Cengage Learning. All Rights Reserved Question A human being sheds a complete layer of skin every 4 months. True or False?

© 2013 Delmar, Cengage Learning. All Rights Reserved Answer False. A human sheds a complete layer of skin every 4 weeks.

© 2013 Delmar, Cengage Learning. All Rights Reserved Question Each square inch of human skin consists of how many feet of blood vessels? a.10 b.20 c.2

© 2013 Delmar, Cengage Learning. All Rights Reserved Answer b. 20

© 2013 Delmar, Cengage Learning. All Rights Reserved Question Ulcers can occur on the skin as well as within the body. True or False?

© 2013 Delmar, Cengage Learning. All Rights Reserved Answer True. An ulcer is an open lesion of the skin or mucous membrane.

© 2013 Delmar, Cengage Learning. All Rights Reserved Question The most common form of skin cancer is: a.melanoma b.basal cell carcinoma c.squamous cell carcinoma

© 2013 Delmar, Cengage Learning. All Rights Reserved Answer b. Basal cell carcinoma is the most common, but least harmful, type of skin cancer.