How Is the Arm Held Clear of the Widest Dimension of the Thoracic Cage?

Answer

The arm is held clear of the widest dimension of the thoracic cage by the clavicle and the scapula. These are both part of what is known as the shoulder girdle. It is also commonly know as the collar bone and the shoulder blade.
Q&A Related to "How Is the Arm Held Clear of the Widest Dimension..."
"The clavicle serves as anterior brace, or strut, to hold the arm away from the top of the thorax." Human anatomy and physiology lab manual, 9th edition by elaine marieb
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The clavicle serves as anterior brace, or
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Be more specific on what you're asking, if you can't then I'm sorry but I don't understand what you want.
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the clavicle serves as anterior brace to hold the arm away from the top of thorax
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