CIRCULUS 



300 



CIRSOMPHALOS 



and umbilical cord. C, First, or Primitive, that of 

 the embryo, a closed system, carrying nutriment and 

 oxygen to the embryo. C, Placental, the fetal 

 circulation. C, Portal. See Portal System. C, 

 Pulmonary, the circulation of blood through the 



The Fetal Circulation. 

 a. Umbilical vein. b. Ductus venosus. c. Ductus arteriosus. 

 d. Hypogastric arteries, e. Mesenteric arteries and vein. 

 f. Portal vein. 



lungs by means of the pulmonary artery and veins, 

 for the purpose of oxygenation and purification. C, 

 Second, the fetal circulation, replacing the omphalo- 

 mesenteric system. C, Systemic, the general circu- 

 lation, as distinct from the pulmonary circulation. 

 C, Third, that of the adult. C, Vitelline, first, or 

 primitive circulation. 



Circulus (sir'-ku-lus) [L.]. A circle. C. arteriosus, 

 the circle of Haller. The plexus of arteries that 

 surrounds the outer border of the iris. C. iridis 

 minor, an arterial circle near the pupillary border of 

 the iris. C. venosus mammae (or Halleri), a 

 ring of anastomosing veins that surround the nipple. 



Circum- (sir'-kum-) [L.]. A prefix meaning around, 

 about. 



Circumagentes (sir-kum-aj-en'-tez) [L. , "causing to 

 revolve"]. I. The oblique muscles of the eye. 2. 

 The infraspinatus and supraspinatus muscles that 

 revolve the arm. 



Circumanal (sir-kum-a'-nal) [circum, around ; anus, 

 the fundament]. Periproctous ; surrounding the anus. 



Circumcision (sir-kum-sizh' -un) [circumcidere, to cut 

 around]. Excision of a circular piece of the prepuce. 



Circumclusion (sir-kum-klu' ' -zhun) [circum, around ; 

 cluJere, to close]. A form of acupressure in which 



the pin is passed beneath the vessel, a wire loop placed 

 over its point, and its ends brought over the artery and 

 made fast. 



Circumcorneal {sir-kum-kor'-ne-al) [circum, about; 

 corneus, horny]. Around or about the cornea. 



Circumduction (sir-kum-dtik' -shun) \_c i re u inducer e, to 

 lead around]. The movement of a limb in such a 

 manner that its distal part describes a circle, the proxi- 

 mal end being fixed. See Motion. 



Circumference (sir-hum'- fer-ens) [circutnfert \ to carry 

 around] . The distance around a part. 



Circumflex {sir' -kum-jleks) [circumjlectere , to bend 

 about]. Applied to a number of arteries veins and 

 nerves. 



Circumgyration (sir-kum-ji-ra' '-shun) [citcurn, around; 

 gyrare, to turn]. See Vertigo. 



Circuminsular (sir-kum-in'-su-lar) [circum, about; 

 insula, island]. Surrounding the island of Reil. 



Circumlental (sir-hum-leu'-tal) [circum, ground ; lens, 

 a lentil; lens]. Surrounding the lens*. C. Space. 

 See Space. 



Circumnuclear (sir-kum-nu'-kle-ar) [circum, about; 

 nucleus, kernel]. Surrounding the nucleus. 



Circumnutation [sir-kum-nu-ta' '-shuj) [circum, 

 around; nutare, to nod]. In biology, a bowing suc- 

 cessively toward all points of the compass. Applied 

 to the movements of young and growing organs. 



Circumocular (sir-ku?n-ok' -u-lar) [circum, about ; 

 oculus, eye]. Surrounding the eye. 



Circumoral (sir-kum-o' -ral) [circum, about ; os, 

 mouth]. Surrounding the mouth. 



Circumpolarization {sir- kwn-po-lar-h-a' -shun) [cir- 

 cum, around ; polus, pole.] The quantitative estima- 

 tion of sugar in a suspected liquid by the degree of 

 the rotation of polarized light, sugar rotating the 

 ray to the right, albumin to the left. 



Circumrenal (sir-kum-re'-nal) [circum, about; ren, 

 the kidney]. Around or about the kidneys. 



Circumscribed (sir' -kum-skrlbd) [circumscribere, to 

 draw a line around]. Strictly limited or marked off; 

 well defined ; distinct from surrounding parts, as a 

 circumscribed inflammation or tumor. 



Circumvallate (sir-kum-val' -at) [circumvallare, to sur- 

 round with a wall]. Surrounded by a wall or promi- 

 nence. C. Papillae, certain papillae at the base of the 

 tongue. 



Cirrhonosus [sir-on' -o-sus) [mp'pbr, yellow ; vdaog, dis- 

 ease]. I. A fetal disorder, marked by yellowness ol 

 the serous membranes. 2. Abnormal post-mortem 

 yellowness of any surface or tissue. 



Cirrhose (sir-os') [cirrus, a tendril]. In biology, pro- 

 vided with tendrils. 



Cirrhosis (sir-o'-sis) [ni'ppdr;, reddish-yellow ; from th< 

 color of the cirrhotic liver]. Increase and thick 

 of the connective tissue of an organ, especially ol tin' 

 liver. C, Biliary, a form due to chronic retention M 

 bile in the liver from long-continued obstruction in tin 

 bile-ducts from any cause. C, Fatty, a rare form in 

 which the hepatic cells become infiltrated with fa 

 The surface is smooth and the organ enlarged, l>» 

 very tough, owing to increase in the interstitial 1 

 tive tissue, which does not contract. This font 1 

 usually seen in the intemperate. 



Cirrhotic (sir-ot'-ik) [nippdc, yellow]. Affected with 

 or relating to, cirrhosis. C. Kidney. See 

 Disease. 



Cirsocele (sir'-so-sel) [nipcltc, a varix ; k//ai/, tumor]. 

 A varicose tumor, especially of the spermatic cord 



Cirsoid (sii'-soid) [mpo6c, a varix; rhhc, likei 

 Resembling a varix, or dilated vein. 



Cirsomphalos (sir-som'-fal-os) [xipaor, varix ; oii(fKd6<;< j 

 navel]. A varicose condition of the navel. 



