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        | Composed of skin, hair, oil & sweat glands, nails, & sensory receptors Maintains body temperature, protects body, & provides sensory information of the environment
 Body’s first line of defense
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        | Covers external surface of body Largest organ in the body
 2 m2 (22 ft2) and ~5 kg (~11 lbs)
 Thickness ranges
 Two main parts: Epidermis & dermis
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        | arthr-joint; logy-study of |  | 
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        | kinesi-movement logy-study of |  | 
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        | no synovial cavity; dense irregular connective tissue (collagen fibers)  little movement; sutures; syndesmoses; interosseous membranes |  | 
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        | no synovial cavity; cartlilage   medium movement; |  | 
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        | synovial cavity; dense irregular connective tissues  most movement; planar joints-biaxial; hinge joints- convex&concave; pivot joints-monoaxial; condyloid joints-knuckle |  | 
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        | saclike structures- resemble joint capsules |  | 
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        | tubelike bursae, wrap around tendons |  | 
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        | decrease in angle between articulating bones |  | 
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        | increase in angle between articulating bones |  | 
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        | movement of the distal end of a body part in a circle |  | 
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        | (synovial)- articular surface fits into a saddle |  | 
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        | transforms into an osteoblast |  | 
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        | functions in resorption, breakdown of bone matrix |  | 
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