Biology 120

1. INTEGUMENTARY SYSTEMCHAPTER 3BIOLOGY 120 Cheryl A. Kirby

2. WHAT IS THE INTEGUMENTARY SYSTEM? The skin and accessory organs (sweat glands, sebaceous glands, hair, and nails)

3. FUNCTION Provides barrier from outside environment Houses sensory receptors Secretes important fluids Regulates temperature

4. TERMINOLOGY There are many medical terms that refer to the skin and skin conditions We make these words by using a root word with a combining form and a suffix

5. DERMAT/O (means skin) Dermat/o plus logist = dermatologist one who studies the skin Dermat/o plus plasty = dermatoplasty surgical repair to the skin Dermat/o plus itis = dermatitis inflammation of the skin

6. MELAN/O (means black) Melan/o plus cyte = melanocyte special cells in the basal layer of the epidermis Melan/o plus oma = melanoma skin cancer caused by overgrowth of melanin in a melanocyte

7. -DERMA (suffix meaning skin) Scler/o plus –derma = scleroderma disorder in which skin becomes taut, thick, and leatherlike Leuk/o plus – derma = leukoderma disappearance of skin pigment causing milk-white patches Ichthy/o plus –derma = ichthyoderma dry and scaly skin condition

8. ONYCH/O (refers to the nail) Onych/o plus ia = onychia infected nail bed Onych/o plus malacia = onychomalacia softening of the nails Onych/o plus phagia = onychophagia nail biting

9. LIP/O (means fat) Lip/o plus oma = lipoma fatty mass Lip/o plus ectomy =lipectomy removal of fat

10. CONCLUSION When we use a root word with it’s combining form and add a suffix we can make several different medical terms that have very different meanings