Performs many roles, most of which protect the body from harm or act as a barrier against the external environment.
What the skin is called, and is considered an organ.
Integument or Cutaneous Membrane
The outer, or surface, layer of the integument/cutaneous membrane. It's composed of stratified squamous epithelium. Like all epithelial tissue, the epithelium is avascular; it has no blood supply of its own. Oxygen and nutrients, however, diffuse into the lower epidermis from the rich supply of blood in the underlying dermis. It can be divided into five layers. Two of the layers are the deeper stratum germinativum and the more superficial stratum corneum.
The inner layer of the integument or cutaneous membrane, and is anchored to a subcutaneous layer.
The study of skin and skin disorders.
Lies on top of the dermis and thus has access to a rich supply of blood. The cells of this layer are continuously dividing, producing millions of cells per day. As the cells divide, they push the older cells up toward the surface of the epithelium. As the cells move away from the dermis, two changes take place. First, as they move away from their source of nourishment, the cells begin to die; and second, the cells undergo a process of keratinization.
A tough protein that's deposited within the cell. It hardens and flattens the cells as they move toward the outer surface of the skin. In addition, it also makes the skin water-resistant.
The surface layer of the epidermis. It's composed of about 30 layers of dead, flattened, keratinized cells. The dead cells are continuously sloughed off through wear and tear.
About 500 ml/day of water is lost through the skin. What is this called?
The dermis lies on this layer, it's not considered as part of the skin; it lies under the skin.
Subcutaneous Layer / Hypodermis
Deep within the epidermal layer of the skin are these types of cells.
Melanocytes secrete a skindarkening pigment.
Oil glands associated with hair follicles and are found in all areas of the body that have hair.
An oily substance that the sebaceous glands secrete that flows into the hair follicle and then out onto the surface of the skin.
Babies are born with a covering that resembles cream cheese. This covering is secreted by the sebaceous glands.
Located in the dermis, and the name implies, these glands secrete sweat; the sweat is secreted into a duct that opens onto the skin as a pore. One person has approximately three million of these.
Sweat / Sudoriferous Gland
These glands are usually associated with hair follicles and are found in the axillary and genital areas. They respond to emotional stress and become active when the person is frightened, upset, in pain, or sexually excited.
These glands are more numerous and widely distributed of the sweat glands. They're located throughout the body and are especially numerous on the forehead, neck, back, upper lip, palms, and soles. These glands are not associated with hair follicles.
These glands are found in the external auditory canal of the ear.
The ceruminous glands secrete wax called?
The mechanism whereby the body balances heat production and heat loss.
Heat loss from a warm object, (the body) to the cooler air surrounding the warm area. Thus a person loses heat in a cold room.
The loss of heat from a warm body to a cooler object in contact with the warm body.
The loss of heat by air currents moving over the surface of the skin.
The neonate, like a squirrel, produces heat by this process. A neonate has brown adipose tissue (BAT), or "brown fat", scattered throughout its body, especially around the neck and shoulder area. Metabolism of BAT generates more heat than dows the metabolism of ordinary adipose tissue.
A disorder of the skin in which the sebaceous glands over secrete sebum. The most common form of this occurring during adolescences is vulgaris.
A fungal infection characterized by vesicles, fissures, ulcers, and pruritus (itching). It most commonly affects the toes but may also involve the fingers, palms, and groin area.
Also called a furuncle; a localized collection of pus caused by staphylococcal infection of hair follicles and sebaceous glands. A carbuncle is multiple, interconnecting furuncles.
Also called a fever blister; a collection of watery vesicles caused by infection with the herpes simplex virus.
Saclike structure containing fluid or semisolid material and surrounded by a strong capsule.
Inflammation of the skin that may be caused by a variety of irritants such as chemicals, plants, and acids. Dermatitis is characterized by erythema (redness), papules (pimplelike lesions), vesicles (blisters), scabs, and crusts. Poison ivy is a form of this. Skin irritation occurs when contact is made with the irritating substance.
From the Greek word meaning to erupt. It is an inflammatory condition (atopic dermatitis) characterized by redness, popular and vesicular lesions, crusts, and scales.
Urticaria. Hives are due to an allergic reaction characterized by red patches (wheals) and generally accompanied by intense itching (pruritus).
A contagious infection of the skin generally caused by the staphylococcus bacterium.
From the Greek word meaning to itch, it's a chronic condition characterized by lesions that are red, dry, elevated, and covered by silvery scales
Several kinds of this are all related to excessive exposure to the sun. The two most common types are basal cell carcinoma and squamous cell carcinoma. Basal cell carcinoma spreads locally and is successfully treated. The most serious and less successfully treated form of this is malignant melanoma, a cancer of the pigment-producing melanocytes.