| A | B |
|---|
| Arrector pili | Muscle associated with hair follicles |
| Ceruminous gland | A gland in the ear canal that produces cerumen or ear wax |
| Dermis | Inner layer of the skin that contains the blood vessels, nerves, glands, and hair follicles; also called stratum corium |
| Epidermis | Outermost layer of the skin |
| Keratinization | Process by which the cells of thw epidermis become filled with keratin and move to the surface where they are sloughed off |
| Melanin | A dark brown or black pigment found in parts of the body, especially skin and hair |
| Sebaceous gland | An oil gland of the skin that produces sebum or body oil |
| Subcutaneous layer | Below the skin; a sheet of areolar connective tissue and adipose tissue beneath the dermis of the skin; also called hypodermis or superficial fascia |
| Sudoriferous gland | A gland in the skin that produces perspiration; also called sweat gland |
| Alopecia | Absense of hair from skin areas where it normally grows; baldness; may be hereditary or due to disease, injury, or chemotherapy or may occur as part of aging |
| Basal cell carcinoma | Malignant tumor of the basal cell layer of the epidermis; most common form of skin cancer and usually grows slowly |
| Cellulitis | Infection of connective tissue with severe inflammation of the dermis and subcutaneous layers of the skin |
| Dermatitis | Inflammation of the skin |
| Eczema | An inflammatory skin disease with red, itching, vesicluar lesions that may crust over; common allergic reaction, but may occur without any obvious cause |
| Eschar | A slough produced by a burn or gangrene |
| Impetigo | Superficial skin infection caused by staphylococal or streptococcal bacteria and characterized by vesicles, pustules, and crusted-over lesions; most common in children |
| Malignant melanoma | Cancerous growth composed of melanocytes; often arises in preexisting mole; an alarming increase in the prevalence of malignant melanoma is attributed to excessive exposure to sunlight |
| Nevus | An elevated, pigmented lesion of the skin; commonly called a mole; a dysplastic nevus is a mole that does not form properly and may progress to a type of skin cancer |
| Pruritus | Sever itching; once of the most common problems in dermatology; arises as a result of stimulation of nerves in the skin by enzymes released in allergic reactions or by other irritating substances |
| Urticaria | Allergic transient skin eruptions characterized by elavated lesions, called wheals, and often accompanied by severe itching and burning; also called hives |
| Wart | Eipdermal growth on the skin caused by a virus; plantar warts occur on the soles of the feet, juvenile warts occur on the hands and face of children, and venereal warts occur in the genital area |
| Xeroderma pigmentosum | A pigmentary and atrophic inherited disease of the skin and eyes that is characterized by vascular lesions, excessive freckling, keratinous growths, carcinoma, photophobia, ocular opacities, and tumors; involves defect in the enzymes active in the repair of DNA damaged by ultraviolet light |
