Humerus is the bone of arm , it connects the shoulder joint (scapula) to the elbow joint (ulna&radius) , it (with muscles) forms the main bulk of the upper arm .             Humerus is a bone that is found in the arm and it help you to move your arm so you can pick stuff up.
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What is PEX? PEX is an acronym for crosslinked polyethylene. It is a flexible, durable, proven piping product that has been used in plumbing systems for more than 20 years. PEX tubing wonât pit, scale or corrode and, because of its flexibility, it also offers potential freeze-damage protection. Uponor plumbing systems feature PEX-a tubing, which is considered the superior PEX tubing manufacturing method in the industry.