circulusture of (sir'ku-lus)

An object or struca circular form. c. arteriosus Halleri. A vascular plexus upon the surface of the sclerotic at the point of entrance of the optic nerve, formed by branches of the short ciliary arteries, c. arteriosus irid is. An arterial plexus which encircles the outer edge of the iris. c. arteriosus irid is minor. A circular arterial plexus in the pupillary region of the iris. c. arteriosus musculi ciliaris. A circular arrangement of the arterioles in the center of the ciliary muscle, c. arteriosus nervi optic i. A circular arterial plexus in the sclera around the entrance of the optic nerve, formed by branches of the short posterior ciliary arteries, c. arteriosus umbilical is. An anastomosis of the arteries of the anterior abdominal wall, the bladder, and the liver, in the form of a circle surrounding the umbilicus, c. arteriosus Will is i i. See circle of Will is, under _ circle, c. articuli vasculosus. A circle formed around articular cartilages by blood ve els in the adjoining synovia] membrane, c. gangliosus ciliaris. A circular nervous plexus in the ciliary mus^ cle. c. Halleri. See c. arteriosus Hal leri, c. venosus mammae, c. major. See systemic circulation, c. Mascagnii. A circular arrangement of the small capil lary branches of the blood ve els in the region of the zonule of Zinn in the fetus. c. mem bran ace us, c. membranosus. The hymen, c. minor. See pulmonary circulation. c. nervosus for am in is ceci. A plexus formed by branches of the glo opharyngeal nerve around the external border of the foramen cecum. c. tonsillar is. A plexus formed over the tonsil by filaments of the tonsillar branches of the glo opharyngeal nerve. ■c. umbilical is. See c. arteriosus umbilical is. c. venosus. An arrangement of veins more or le in the form of a circle. c. venosus Halleri. See c. venosus mammae, c. venosus Hovii. A ringlike anastomosis of the venae -vorticosae in the choroid, c. venosus ischiadic us. A venous anastomosis between the vena circumflex i a medial is and the vena ischiadic a. c. venosus mammae. An anastomosis of veins around the nipple. c. venosus obturator i us. A venous anastomosis, beneath the obturator muscles, between the vena circumflex i a femoris medial is and the obturator vein. c. venosus tracheal is. A venous anastomosis surrounding the trachea at about the level of the lower border of the thyroid gland. c. venosus umbilical is. A circular venous anastomosis around the navel. [Lat., dim. of circus, ring, from Gr., kuklos.l