anatomy of a spider tarsus Spider_anatomy abdomens abdomens tarsus abdomens thorax abdomens abdomens tarsus abdomens abdomens abdomens tarsus abdomens tarsus view article cephalothorax cephalothorax external anatomical diagram abdomens tarsus abdomens abdomens tarsus external anatomical diagram view article abdomens abdomens abdomens abdomens tarsus tarsus abdomens tarsus abdomens tarsus abdomens Spider anatomy abdomens abdomens abdomens tarsus external anatomical diagram tarsus abdomens tarsus spider anatomy cephalothorax