The fibers are carried by both the anterior and posterior vagal nerves. Bounded by the anterior and posterior leafs of the renal fascia. Euhirudinea have both anterior and posterior suckers. These are divided into anterior and posterior pathways. Sclerotomes become subdivided into an anterior and a posterior compartment. Both the anterior and posterior of the cuttlebone taper gradually to an acute point. They are divided into posterior and anterior divisions. It is composed of three lobes&colon; the anterior, intermediate, and posterior lobes. They are divided into anterior and posterior groups. Only the extreme anterior and posterior ends of the female are exposed. These are located classically at left lateral, right anterior, and right posterior positions. With modern implant designs, dislocation rates are similar between the anterior and posterior approaches. The area where the anterior and posterior parts join is constricted. These are connected by anterior and posterior limbs (). These are called the "anterior" and "posterior" circulation respectively.