Definition of piece rate: Payment by results. Wage determination system in which the employee is paid for each unit of production at a fixed rate.
The main arteries in the neck are the common carotids arising differently, one on each side (see the images below). On the right, the common carotid arises at the bifurcation of the brachiocephalic trunk behind the sternoclavicular joint; on the left, it arises from the highest point on arch of the aorta in the chest.
The common carotid artery is the large artery whose pulse can be felt on both sides of the neck under the jaw. On the right side it starts from the brachiocephalic artery (a branch of the aorta), and on the left side the artery comes directly off the aortic arch. At the throat it forks into the internal carotid artery and the external carotid artery.