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Place a word or phrase from the left into each blank in a sentence on the right to make it The act of clapping your hands out in front of you with your elbows fully extended is achieved by contracting the _____ muscles. Moving your arms from your sides in an attempt to form the letter “T” with your body is achieved by contracting the lateral fibers of the _____ muscles. The motion required to pull on the oars of a boat is achieved by contracting the _____ muscles.