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 Biofeedback? Biofeedback is a technique you can use to learn to control your body's functions, such as your heart rate. With biofeedback, you are connected to sensors that help you receive information (feedback) about your body (bio). Biofeedback gives you the power to use your thoughts to control your body, often to help with a health condition or physical performance.