Ch. 7.3 Integumentary System KEY TERMS
A person with an absence of color pigments.
Albino
A closed sac with a distinct membrane that develops abnormally in a body structure; usually filled with a semisolid material.
Cyst
The innermost layer of skin (also called subcutaneous fascia). It is made of elastic and fibrous connective tissue and adipose (fatty) tissue, and connects the skin to underlying muscles
Hypodermis
Firm, raised areas such as pimples and the eruptions seen in some stages of chickenpox and syphilis.
Papules
A deep loss of skin surface that may extend into the dermis; may cause periodic bleeding and the formation of scars.
Ulcer
Loss of hair on the scalp.
Alopecia
The layer of skin also called corium, or "true skin." It has a framework of elastic connective tissue and contains blood vessels, lymph vessels, nerves, involuntary muscle, sweat and oil glands, and hair follicles.
Dermis
The skin, which on an average adult covers more than 3,000 square inches and accounts for about 15 percent of total body weight.
Integumentary system
Pus-filled sacs such as those seen in acne, or pimples.
Pustules
Blisters, or fluid-filled sacs, such as those seen in chickenpox.
Vesicles
To get smaller (referring to blood vessels).
Constrict
To get larger (referring to blood vessels).
Dilate
A yellow discoloration of the skin, which can indicate bile in the blood as a result of liver or gallbladder disease.
Jaundice
Oil glands that usually open onto hair follicles and produce sebum.
Sebaceous glands
Itchy, elevated areas with an irregular shape; hives and insect bites are examples.
Wheals
Areas of dried pus and blood, commonly called scabs.
Crusts
The outermost layer of skin.
Epidermis
Flat spots on the skin, such as freckles.
Macules
The innermost layer of skin (see Hypodermis).
Subcutaneous
A bluish discoloration of the skin caused by insufficient oxygen.
Cyanosis
A reddish color of the skin that can be caused by either burns or a congestion of blood in the vessels.
Erythema
A brownish black pigment produced in the epidermis by specialized cells called melanocytes.
Melanin
Sweat glands, which are coiled tubes that extend through the dermis and open on the surface of the skin at pores.
Sudoriferous glands