Ch. 7.3 Integumentary System Key Terms
Albino
An individual with a genetic condition called albinism, which is an inherited inability to produce melanin.
Cyst
A closed sac containing fluid or semisolid material.
Hypodermis
The innermost layer, also called the subcutaneous fascia, connects the skin to underlying muscle.
Papules
Firm, raised areas on the skin, such as pimples.
Ulcer
A deep loss of skin surface that may extend into the dermis; it may periodically bleed and form crusts
Alopecia
A condition that causes hair loss in some areas of the body.
Dermis
The layer of skin directly below the epidermis.
integumentary system
The body system that includes the skin, along with accessory organs such as hair, nails, and glands (sweat and oil glands).
Pustules
Pus-filled sacs, such as those caused by acne or pimples.
Vesicles
Blisters, or fluid-filled sacs, such as those seen in chickenpox.
Constrict
If the body is cold, the vessels constrict (get smaller) to retain heat.
Dilate
When the blood vessels dilate (get wider), the excess heat can escape through the skin
Jaundice
A condition in which the skin has a yellowish color, usually indicating bile in the blood as a result of liver or gallbladder disease.
sebaceous glands
Oil glands that usually open onto a hair follicle and produce sebum.
Wheals
Itchy, elevated areas with an irregular shape; also called hives or insect bites.Skin Conditions)
Crusts
Areas of dried pus and blood, commonly called scabs.
Epidermis
The outermost layer of the skin.
Macules
Flat spots on the skin, such as freckles.
Subcutaneous
Pertaining to the layer of tissue under the dermis (the hypodermis).
Cyanosis
A condition in which the skin has a bluish color due to a lack of oxygen.
Erythema
A condition in which the skin has a reddish color caused by burns or a congestion of blood in the vessels.
Melanin
A pigment produced by melanocytes that gives the skin its color and protects the body from harmful ultraviolet radiation.
sudoriferous glands
Sweat glands that excrete perspiration (sweat) to cool the body.