AdvertisementArmed And Deadly: Shoulder, Weapons Key To HuntAugust 02, 2010Christopher JoycefacebookEmailThe human shoulder (above) allows the arm to hang freely and enables us to flex the arm at the elbow and perform tasks in front of us with ease. Because of its location and structure, the human arm is great for throwing. The ape shoulder (below), by contrast, allows for a different range of motion and is more suited to hanging from trees. (NPR)