CHAPTER_FOUR - CHAPTER FOUR INTEGUMENTARY SYSTEM The...

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CHAPTER FOUR INTEGUMENTARY SYSTEM The integumentary system is composed of the skin, nails, and glands. The skin forms a protective covering for the body and, when unbroken, (1) prevents entry of bacteria and other invading organisms and objects. It also (2) protects the body from water loss and (3) protects it from the damaging effects of ultraviolet light. Its other functions include (4) regulation of body temperature and (5) synthesis of vitamin D. SKIN TERM DEFINITION epidermis outer layer of skin keratin horny (or cornified) layer composed of protein. It is contained in the hair, skin, and nails. melanin color (pigmentation) of the skin dermis ( true skin ) inner layer of the skin (also called true skin ) sudoriferous (sweat) glands tiny, coiled, tubular structures that emerge through pores on the skin’s surface and secrete sweat sebaceous glands secrete sebum (oil) into the hair follicles where the hair shafts pass through the dermis ACCESSORY STRUCTURES OF THE SKIN TERM DEFINITION hair compressed, keratinized cells that arise from hair follicles; the sacs that enclose the hair fibers nails originate in the epidermis. Nails are found on the upper surface of the ends of the fingers and toes. (The white area at the base of the nail is called the lunula or moon .) 1
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PREFIXES AND SUFFIXES PREFIX DEFINITION epi- on, upon, over intra- within para- beside, beyond, around per- through sub- under, below SUFFIX DEFINITION -a noun suffix, no meaning -coccus (pl. -cocci) berry-shaped (form of bacterium) -ectomy excision or surgical removal -ia diseased or abnormal state, condition of -itis inflammation -malacia softening -opsy view of, viewing -phagia eating or swallowing -plasty surgical repair -rrhea flow, excessive discharge -tome Instrument used to cut COMBINING FORMS COMMONLY FOR THE INTEGUMENTARY SYSTEM TERMS COMBINING FORM DEFINITION cutane/o, derm/o, dermat/o skin hidr/o sweat kerat/o horny tissue, hard 2
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onych/o, ungu/o nail seb/o sebum (oil) tricho/o hair COMBINING FORMS COMMONLY USED WITH INTEGUMENTARY SYSTEM TERMS aut/o self bi/o life coni/o dust crypt/o hidden heter/o other myc/o fungus necr/o death (cells, body) pachy/o thick rhytid/o wrinkles staphyl/o grape-like clusters strept/o twisted chains xer/o dry DISEASE AND DISORDER TERMS BUILT FROM WORD PARTS TERM DEFINITION dermatitis inflammation of the skin dermatoconiosis abnormal condition of the skin caused by dust dermatofibroma fibrous tumor of the skin hidradenitis inflammation of a sweat gland
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This note was uploaded on 11/22/2010 for the course HSC 2531 taught by Professor Chancey during the Spring '10 term at Santa Fe College.

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CHAPTER_FOUR - CHAPTER FOUR INTEGUMENTARY SYSTEM The...

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