Ch. 7.3 Integumentary System Key Terms
What is Albino
A person with an absence of color pigments. An albino's skin has a pinkish tint and the hair is pale yellow or white.
What is a cyst
A closed sac with a distinct membrane that develops abnormally in a body structure; usually filled with a semisolid material.
What is hypodermis
The innermost layer of the integumentary system; also called subcutaneous fascia; it is made of elastic and fibrous connective tissue and adipose (fatty) tissue and connects the skin to underlying muscles.
What is papules
(papular rash) firm, raised areas such as pimples and the eruptions seen in some stages of chickenpox and syphilis.
What is ulcer
A deep loss of skin surface that may extend into the dermis; may cause periodic bleeding and the formation of scars.
What is alopecia
Baldness, a loss of hair on the scalp.
What is a dermis
Also called corium, or "true skin." This layer has a framework of elastic connective tissue and contains blood vessels, lymph vessels, nerves, involuntary muscle, sweat and oil glands, and hair follicles.
What is integumentary system
The skin, or skin, on an average adult covers more than 3,000 square inches of surface area and accounts for about 15 percent of total body weight.
What is pustules
Pus-filled sacs such as those seen in acne, or pimples.
What is Vesicles
Blisters, or fluid-filled sacs, such as those seen in chickenpox.
What is constrict
(Implicitly defined as the opposite of dilate, or to become smaller/narrower.) Blood vessels constrict (get smaller) when the body needs to retain heat.
What is dilate
To get larger. Blood vessels dilate (get larger) when the body needs to release excess heat.
What is jaundice
A yellowish discoloration of the skin, can indicate bile in the blood as a result of liver or gallbladder disease. Jaundice also occurs in conjunction with certain diseases that involve the destruction of red blood cells.
What is sebaceous glands
Oil glands that usually open onto hair follicles. They produce sebum, an oil that keeps the skin and hair from becoming dry and brittle.
What is wheals
Itchy, elevated areas with an irregular shape; hives and insect bites are examples.
What is crusts
Areas of dried pus and blood, commonly called scabs.
What is epidermis
The outermost layer of skin. This layer is actually made of five smaller layers but no blood vessels or nerve cells.
What is macules
(macular rash) flat spots on the skin, such as freckles.
What is subcutaneous
The innermost layer of the integumentary system, also called the hypodermis or subcutaneous fascia.
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What is cyanosis
A bluish discoloration of the skin caused by insufficient oxygen.
What is erythema
A reddish color of the skin that can be caused by either burns or a congestion of blood in the vessels.
What is melanin
A brownish black pigment, produced in the epidermis by specialized cells called melanocytes.
what is Subdoriferous gland
Sweat glands that are coiled tubes that extend through the dermis and open on the surface of the skin at pores.
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