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Show in 15/25 (ltfii'rmit Parts (film Body. Ofr'lm pm-ticizlm‘ Dvsrriptimz flflbé' Absmbcnl Vessels aorta, and was then upon its left side, it still crossed under the arch of the tit eam pressionem inserted into the right subclavian vein. " Suspiceris, aorta arcum potentiorem experiatur, ad sinistram axillarem vcnam, pone x: adeo subclavi dextraa fuisset propior qtti traduci, cliyliferum ductum ti forent, is certc constante nature: fine, tit cum onmia viscera transposi pulse of the aorta ductus in dextrain pariter subclaviam inscreretur."--The d fluids through the may he a powerful assistant in driving on the absorbe be of the same uti- thoracic duct, and the pulse of arteries in general may l force prolity to its branches, in propelling their fluids; but the principa rpowers of the pelling the absorbed fluids, is to be attributed to the muscula often forsake the ar- absorbent vessels themselves. For the absorbents very less resistance right I have already given, Viz. that its fluids might receive in the Cara from i ‘ stagnation, or even retrograde motion, of the blood ion of the superior and its great branches, that take place on the contract right auricle. The angle of the right subclavian, or, properly speaking, the right jugular vein, is in a direct line with the cava superior, whilst the an ob- left jugular is at right angles with the subclavian, and this last forms ce in the right tuse angle with the cava superior; and therefore the resistan left.- side is greater, to the entrance of the absorbed fluids, than in the emerged aving duct.-H thoracic the of ion descript the But 1 return to near the above the diaphragm, it gradually becomes smaller, until it comes a line in middle of the back, where it is frequently not much more than termination may be diameter; after this, it gradually enlarg " and near its ly five lines frequent was it that said ll'd\C 1 : diameter in lines about three in diameter at its origin. Once I saw it as large as a goose-quill, through injected it, its whole length; and this winter my assistant, Mr. VV'ilsoii, half "hen it took two pounds of quicksilver to fill it, and was in most parts, it appears an inch iit diameter. \Vlitn injected through its whole length, ly serpen- to run serpentine; in this last mentioned instance it was amazing tine, but this may sometimes be a deception: arteries that were formerly straight, 73.." -7 "we... («t-marsh, r branches of the brachial artery, round the joint of the fore-armband *‘d‘s after the operation for the false aneurism, from bleeding; at that ')l"1C(‘ all‘l'n' been performed; these arteries in general are straight; [but aftci' ihc, "5 ration for the aneurism, become exceedingly serpentine ) Tilt) tlr fipf- dttet, (however, without being injected, is somewhat serpenti ne Kalli: :Z::,Cnd:cr thoraceni adseendit, paulum serpentintts, tainen ut pene rectus b In the incurvations of the spine, the thoracic duct, as tied to it by it ranches, by those of the azygos, and by cellular membra ne must make fliedsamfie jvtndings and angles that the spine happens to make; and as tn s, 1 tie )ro'ectile f)‘ ‘ V ‘ ' i i i through a strziighjt than , tilStrifedlldiSmel ~ , ief‘fgi‘chmfc Withwuh‘ which greater the absorbe Vdocny d fluids ‘of the thoraCic dttet overcome the resistance to their entrance into the veins, made by the blood in them, must be diminished in such bodie"~ but whether this diminution of force is attended with any material befd consequence, I do not know. I have seen a trunk of the. absorbents of the lungs convoluted at least a thousand times before it entered the duct * and I have seen similar convolutions in parts of the duct itself. A creat'deal of power appears to be lost, by the construction of animals, in manby of their parts,- but this loss appears not to be attended to, when an ade u'ttc advan tage isproeured in some other way. 1 q K - During its course along the VCthbl‘ét of the thorax it has the aorta on its eft side, and the veiia azygos on its right, and is besides surrounded with ntlmbCl‘lE‘SS ramifications of the inferential and [tar I'ZIQ‘IHH particularl i the former: this last circumstance by some is supposed merely'accidenta l. >Pro- (f:21"Si‘cfiitjujiyj in his elegant publication on the Intcrcostal Nerves, ' t ', lILIUI‘tl tlioracicum nullos liabert: nervos." No: that the do not he on lt< surface, and surround it, we lurow the . rarv. but tlisz Vid. Plat. IV. a b. e Z 2 A. A", gov. . in general, from and in their accompanying the cutaneous veins in animals why the thora‘ \xhich they can receive no propelling impulse. One reason ce to the L‘lC duct goes to be inserted into the left subclavian, in preferen heart, in proportion, than most other arteries, are more dilated and moi]-c serpentine. We see the same thing also in the collateral aii'istomi ‘i : L" -35" ies of quadrupeds, teries, and go by themselves, as we sec 011 the mesentcr 1"‘ straight, become serpentine on being very much distended as we see i l arteries on the outside of the head, in old men, trliieh'beinrr iicare: fl". ran":.~..4 "A r70 |