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Chapter 6
Skin and the Integumentary System
21
Science
Not Applicable
09/13/2011

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Term
Organs
Definition
Body structures composed of two or more different tissues.
Term
Integumentary System
Definition
Made up of the skin and its accessory organs.
Term
Serous Membranes*
Definition
Line body cavities that lack openings to the outside. Made of epithelium and loose connective tissue. Secrete serous fluid that acts as a lubricant.
Term
Mucous Membranes*
Definition
Line the cavities and openings that lead to the outside of the body. EX: oral and nasal cavities. Made of epithelium and connective tissue with cells that secrete mucus.
Term
Synovial Membranes*
Definition
Line the joint cavities. Made of only connective tissue and secrete lubricating synovial fluid.
Term
Cutaneous Membrane*
Definition
Also known as the skin.
Term
Epidermis*
Definition
First layer of skin, made up of stratified squamous epithelium and lacks blood vessels. Protects against water loss, mechanical injury, chemicals, and microorganisms.
Term
Melanin
Definition
Protects deeper cells from the sun's UV rays. Responsible for skin color.
Term
Dermis*
Definition
Binds the epidermis to underlying tissues. Consists of connective tissue with collagen and elastic fibers within gel-like ground substance.
Term
Subcutaneous Layer*
Definition
Also called the hypodermis, is composed of loose connective and insulating adipose tissue. It binds the skin to underlying organs and contains blood vessels.
Term
Definition
Consist of stratified squamous epithelial cells.
Term
Sebaceous glands*
Definition
Also called holocrin glands, are associated with hair follicles and secrete sebum that waterproofs and mosturizes the hair shafts.
Term
Eccrine*
Definition
Sweat glands that respond to body temperature.
Term
Apocrine*
Definition
Sweat glands that respond to body temperature, stress, and sexual arousal.
Term
Ceruminous Glands*
Definition
Modified sweat glands that secrete wax in the ear canal.
Term
Mammary glands*
Definition
Modified sweat glands that secrete milk.
Term
Stratum Basale
Definition
First layer of epidermis.
Term
Stratum Spinosum
Definition
Second layer of epidermis.
Term
Stratum Granulosum
Definition
Third layer of epidermis.
Term
Stratum Corneum
Definition
Fourth layer of epidermis.
Term
Stratum Lucidum
Definition
Fifth layer of epidermis, but only in certain parts of the body. It's usually found in palm of your hand or bottom of feet.
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