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Epithelial membranes and Connective tissue membranes
There are two major categories of body membranes:
Composed of epithelial tissue and an underlying layer of specialized connective tissue
Connective tissue membrane
Composed exclusively of various types of connective tissue; no epithelial cells are present in this type of membrane
Cutaneous, serous, mucous membrane
There are three types of epithelial tissue membranes in the body:
A two-layered epithelial membrane that lines body cavities and covers the surfaces of organs
The connective tissue layer of the serous membrane that holds and supports the epithelial cells
inflammation of the serous membrane (pleura) that line the chest cavity and cover the lungs
Inflammation of the serous membranes in the abdominal cavity. Is sometimes a serous complication of an infected appendix
Epithelial membranes that line body surfaces opening directly to the exterior and secrete a thick, slippery material called mucus
Describe the transitional area that serves as a point of "fusion" where skin and mucous membranes meet
Connective tissue membrane lining the spaces between bones and joints that secretes synovial fluid
The outermost layer of the skin. It is a relatively thin sheet of stratified squamous epithelium
Deeper of the two payers. It is thicker than the epidermis and is made up largely of connective tissue
The loose, ordinary (areloar) tissue just under the skin and superficial to the muscles; also called subcutaneous tissue or superficial fascia
This connective tissue acts as a shock-absorbing pad and helps protect underlying tissues from injury caused by bumps and blows to the body surface
The innermost of the tightly packed epithelial cells of the epidermis; cells in this layer are able to reproduce themselves
A baglike fluid-filled elevation of the skin caused by an irritant such as heat, friction, or a chemical
The layer of the epidermis that contains the melanocytes that produce melanin to give skin its color
It's main function is to absorb harmful ultraviolet radiation from sunlight before it reaches tissues below the outer layers of the skin
The junction that exists between the think epidermal layer of the skin above and the dermal layer below
Upper region of the dermis that forms part of the dermal-epidermal junction and forms the ridges and grooves of fingerprints
A small, cap-shaped cluster of cells located at the base of the follicle where hair growth begins
Smooth muscles of the skin, which are attached to hair follicles; when contraction occurs, the hair stands up, resulting in "goose flesh"
Between the depressed points of the skin and at the same time pulls the hairs up until they are more or less straight
Tactile (Meissner) corpuscle
A sensory receptor located in the skin close to the surface that detects light touch
Lamellar (Pacini) corpuscle
A receptor found deep in the dermis that detects pressure on the skin surface
3000 eecrine sweat glands
A single square inch of skin on the palms of the hands estimate how many eccrine sweat glands?
Pinpoint-size opening on the skin that serves as an outlet of a small duct from the eccrine sweat glands
Apocrine sweat glands
Sweat glands located in the axilla and genital regions; these glands enlarge and begin to function at puberty
Sebum that accumulates, darkens, and enlarges some of the ducts of the sebaceous glands; also known as a comedo
Squamous cell carcinoma
Malignant tumor of the epidermis; slow-growing cancer that is capable of metastasizing; the most common type of skin cancer
Basal cell carcinoma
One of the most common forms of skin cancer, usually occurs on upper face, with low potential for metastasizing
Squamouse cell carcinoma, basal cell carcinoma, and malignant melanoma
What are the three most common types of skin cancer
Epidemiological studies show that adults who had more than two blistering sunburns before the age of 20 have a much greater risk to develop:
Protection, temperature regulation, sense organ activity
What are three most important function of the skin
o Benign moles are usually symmetrical; their halves are mirror images of each other.
o Melanoma lesions are asymmetrical or lopsided
o Benign moles are outlined by a distinct border
o malignant melanomal lesions are often irregular or indistinct in shape.
o Benign moles may be any shade of brown but are relatively evenly colored
o Melanoma lesions tend to be evenly colored, exhibiting a mixture of shades or colors.
An injury to tissues resulting from contact with heat, chemicals, electricity, friction, or radiant and electromagnetic energy; classified into four categories, depending on the number of tissue layers involved
"Rule of Nines"
A frequently used method to determine the extent of a burn injury; the body is divided into 11 areas of 9% each and 1% to the perineum to help estimate the amount of skin surface burned in an adult
Minor discomfort and some reddening of the skin. The surface layers of the epidermis may peel in 1 to 3 days, no blistering occurs, and actual tissue destruction is minimal
Deep epidermal layers and always causes injury to the upper layers of the dermis. Complete destruction of the dermis does not occur.
Term used to describe both minor burn injury and severe burns that injury both epidermis and dermis (first and second degree burns)
also known as full-thickness burn; characterized by complete destruction of the epidermis and dermis
This layer of skin contains a specialized network of nerves and nerve endings to process sensory information.
This condition occurs when blood oxygen levels decrease or if actual blood flow is reduced dramatically
Which sweat glands are the most numerous and are, with few exceptions, distributed over the total body surface?
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