Explain how the four major tissue types work together in the human arm.

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The epithelial tissue- covers the body surface and forms the lining for most internal cavities. Connective tissue- provide a variety of functions including support and protection. Muscle tissue:  skeletal-voluntary type of muscle tissue that is used in the contraction of skeletal parts.  smooth- found in the wall of internal organs and blood vessels. cardiac- found only in the walls of the heart and is involuntary in nature. 

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