albino- A person with an absence of color pigments.

alopecia- baldness, a permanent loss of hair on the scalp.

constrict- when the blood vessels get smaller, the heat is restrained in the body.

crusts- area of dried pus and blood.

cyanosis- bluish discoloration of the skin caused by insufficient oxygen.

cyst- A closed sac with a distinct membrane that develops abnormally in a body structure.

dermis- layer has a framework of elastic connective tissue and contains blood vessels, lymph vessels, nerves, involuntary muscle, sweat and oil glands, and hair follicles.

dilate- when the blood vessels get larger, excess heat from the body can escape.

epidermis- the outermost layer of the skin.

erythema- reddish color of the skin that can be caused by either burns or congestion of blood in the vessels.

integumentary system- covers the body, and an organ, contains several kinds of tissue.

jaundice- yellow discoloration of the skin.

macules- flat spots on the skin (freckles)

melanin- brownish black pigment.

papules- raised such areas as pimples and the eruptions seen in some stages of chickenpox and syphilis.

pustules- pus filled sacs.

sebaceous glands- oil glands that usually open onto hair follicles.

subcutaneous facias- innermost layer. made of elastic and fibrous connective tissue and adipose tissue, and connects to the skin to underlying muscles.

sudoriferous glands- sweat glands are coiled tubes that extend through the dermis and open on the surface of the skin at pores.

ulcer- a deep loss of skin that may extend into dermis.

vesicles- blisters or fluid filled sacs.

wheals- itchy, elevated areas with an irregular shape.