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JB Anata & Phys

Integumentary System

Integumentary System The body covering including skin, hair, and nails
medical prefix's for skin are derm- dermat-, cut-, cutan-
Structures of the skin epidermis, dermis, and subcutaneous
Epidermis outer layer of the skin composed of stratified squamous epithelium
Epidermis is composed of 5 strata (layers); regenerates from the bottom strata and forces cells outward, packing them close together
The outer strata (corneum) is composed of
the epidermis contains no nerve endings or blood vessels
the epidermis provides a protective waterproof covering
the epidermis contains melanocytes (pigment cells) for protection from sunlight
The epidermis is protected by normal flora (bacteria) which serve as a natural protection
the epidermis regenerates readily
Dermis (true skin) made up on dense connective tissue
Dermis contains collagen which is gluelike fibers that run parallel to the skin and are the source of body lines
blood vessels are in excellent supply in the dermis layer they do what they dilate to bring blood near the surface for cooling and constrict to prevent loss of heat
sweat glands lie deep in the dermis and send secretions through the ducts to the skin for
sebaceous glands open into hair folicles and secrete sebumto keep hair and skin lubricated and provide protection against both bacteria and drying
sensory receptors are located in the dermis they are receptors for pain touch cold heat and vibration
arrector pili muscles (attached to teh hair contract to make hair stand up and produce chillbumps
Subcutaneous (below the skin) made up of adipose tissue
Sub-Q provides insulated gives the body a rounded appearance
sub-q tissue is closed with what kind of suture during surgery absorbable
sub-q skin is used to inject meds that would need to be slowly absorbed
sub-q skin heals more slowly and is a good medium for bacteria to grown
Appendages of the skin (such as hair and nails) are extensions of the epidermis
hairs color is dirived from melanocytes
hair is kept pliable by oil from the sebaceous glands
excess hair may be __________ before surgery shaved
skin acts as a mechanical barrier to __________________. microorganisms
Skin acts as a ____________, to keep us in touch with out environments. sensory organ
skin regulates _________by the process of ______________(sweating) and radiation(blood evaporation, (blood to the body surface to give off heat)
skin protects against ______________ and ______________. physical trauma and fluid loss
Created by: schxoxo



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