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Show " ~_-& 0f the Veim relating to the Heart. 4 Book II. Book II . 0f the Veins relating t0 the Heart. H 789 \_.\ implanted into one Trunk, which cmptieth the torrent of Blood by a iarge Orii'ice, into the Left Ventricleof the Heart. Membranoflzm, Fibrofam, (7 Camoflzm Conflituit. ,.,t,, .., - mm druyd<HM\ZmV Gown: 73‘ was "any". The coronary Veins do {hade the Heart with great variety of Branches, encircling the Bafe, and afcend toward the Cone, thefe Veins begin in 'vhe Firll produéil'ul of \ tins. molt numerous minute Capillaries, and afterward are enlarged into greater and greater Branches, which are all implanted into one Trunk of the Cam, The Veins, ( as I conceive) haVC their principle of Generation after this manner 5 the vital Liquor after it hath received its firlt Rudiment in the ambient parts of colliquated feminal Liquor, doth feparate it felf from the other more grofs vilcid parts, which are concreted on every tide of the vi. tal Liquor into a round membranous Tube, in which the Blood is conveyed to the beating point; and afterward maketh its retrograde Motion from a rough draught of the Heart, not confufedly tranfmitted through the inward feminal Receflbs, but is tranlinitted by other Tubes, formed on each tide of the Blood, of the more grofs genital juyc'e, coagulated by Heat into membranous Cylinders, conveying the gentle {tream of Blood from the circumference of the melted Seminal Liquor ,And it being granted that the Parts of Blood being near akin, do efpoufe a confederacy in their firit formation, and affecting Motion as their great prefervation and complement, do by their heat and fpirit, feparate the more faeculent adjacent parts of the femi. nal Liquor, which is coagulated on each iide of the Blood, into round oblong Tunicles, through which, as f0 many Channels, the Blood is firft con- veyed by Veins fromthe circumference of the feminal Liquor, to the Center, and then from the beating point, the origen of the Heart, it is carried in by a retrograde l\/Iotion, by other Tubes, as Rudiments of Arteries, into the ambient parts of Cryllalline Liquor, in which the Plaitick power doth refide The Fnbflantc ot [ch Veins. The frame of the can-.atd ( out ofthc Veins. Thcinwzrd Coat of the Veins male upof various iribiils. which is an efficient caufe of the firlt production ofall parts of the Body. , The Veins of the Heart are endued with a fubfiance common to all veins of the whole Body, which is for the molt part Membranous, as capable of Dif'cention, without any Laceration, which elfe would happen, were they not accommodated with variety of membranous Fibrils. The fubftance of the Veins is thinner then that of Arteries, and is made up of two Coats only, the outward may receive the appellative of Common, as taking its rife from the neighbouring parts, in the middle apar- mo 2'ng m; 7,, MW ,2, "My ,1/ Th: innate" \ \'.‘fl1"'I-\‘\V; , To Mp on, bade; ($1 ,9 vault :2qu 79 3, WJ‘de'es, "x .3 03%.;- Coats,sc» Cr‘tiilng to strides 35m L; "'73,, ,9 mil"? 'sm 2179;1'24 uicrnpfip'ha Mrrrly 'ésir évyfir mi' imid iii: MAM; [Jfaxymfin (la/m lS Warm/Vii" munigafitm, ,7 hm'z in Wescin'i e‘um'euw, In fingtz/is fimphcium dC primarum, qua: ‘zmcant, partium ( ut in dzfl‘eéiionibnr er (wiretap/41:15 ) alia portio fnbflantix efl welttti Fibre/a, alza Membranofa, alia (arnoflz ,Jfimt exempli "mfg, rum elem: zmicam timztam habeat, U eam temtem, [it‘ct ['iirriu in ca iizt enict "miter, quarfimt anmeofir quibufdam inter/iris COIZYC'Xftl', qztibnr ntrzfytte proPr" wakefubflantm aclmzfczmr. , This Hypothelis of Great Galen may be plainly proved by Autopfy in ces, then about the termination of the Vemz C4714, whereupon they are not larly, its afcent in the afcendent Trunk of the Cam, toward the Right Ven~ tricle of the Heart. And this Hypothefis may be farther confirmed, that the flelliy Fibres are of great importance to give vigor and l'trength to the coats of the Veins, which being highly dilated by great torrents of Blood, or by a quantity of grofs vital Liquor, have their inward coat broken with its annular Fibres, f0 that it groweth f0 relaxed, that it cannot contraét it felf, by reafon the Fibres are lacerated, which is very confpicuous in war-icilmr wmrtmz, 4 Fi= 12m circularibur difruptz'r, prowenientibnr. The Veins have many Valves aflixed to their inward Concave Surface, to each other in atriangular Figure. The fet number of the Valves feated in the infide of the Veins, cannot be recounted, by rcafon the eminent Valves, placed in the great Veins, can only be difcerned, and the infinite number of minute Valves , befetting the fmall Veins, can no ways be difcovered, but it is very clear to being confidered by Reafon, may be rendred manifeflr, as being wifely infii. tuted by Nature, to conferve the due tone of the Veins, when much di{tended by an exuberant quantity of Blood, of which they being freed, have a power to reduce their Coats to their former Primitive, more eafy brcs ufth: Veins, culation of Blood, which elfe would be Very {low in the Veins, were they not aflilied with circular flefhy Fibres , which contraéting themfelves , do very much promote the motion of the Blood in all Veins, and more particu. branched through the ftibitaiice of the Vifcem; This Tuniclc is framed of are right, others oblique, andaThird Tranfverfe, and though this variety The ufenf the flail-i} Fi; ofthe Veins, are of a very important, if not neceiiary me, to further the cir- many fmall Fibrils, running in variety of pofitions, whereupon this outward of Membranes can hardly be demonfirated by the evidenhe of Senfe as being fo fine and clofc (truck, that they elude the moi't quick Eye, yet they Fibres ot'thc‘ Cave. f0 eafily fcen. And I humbly conceive the annular Helhy Fibres, encircling the Tunicles timent from the Flame. andin the loweft from the rimm of the Belly and are not invcfted with this Coat, when they make their Ingrefs, and are Tunicle, compofed of threefold Fibres, rarely interwoven, of which fome The flrlhy the Vemz Car/a, oflarge Animals adjoyning to the Right Side of the Heart 3 andI humbly conceive, that other parts of the Trunk, and branches of the Cart/a are befet with flelhy Fibres too, which are much linaller in thofe pla- and are framed of a thin compacted membranous fubltance, derived (as I apprehend ) from the interior Tunicle of the Veins. They are adorned with a femilunary Figure, and are for the moit part fingle, and fometimes double, and fometimes treble, as fome conceive, feated againft each other, which are found only in the great Veins of large Animals: Some Anatomilts have difcovered Three Valves, feared oppofite Coat is receptive of Diltention, without prejudice to its Compage. The Second Gear of the Veins may be liiled proper, which is its inward thhtanous, l-ihti us, and Carnousi The Valve! cfthc Veins. The Figure ofthr: Valrct. The number of the Valm‘ cannot be counted. Reafon, that there be fuch Valves, which are configned to a great ufe, to give a check to the retrograde motion of the Blood toward their Origens, which elfe would deftroy its circuit toward the Heart, which is abfolutely necelfary to preferve the choice vital Flame. And feeing the Veins and Arteries are both Channels, importing and ex- The motion of the Blood porting rivulets of Blood,to and from the Heart; it may be Worth our confideration, to affign the Veffels, in which the motion of the Blood is commen- poiiure. Ann‘s 13 m6: 031 5 WW, Tennis év ram all hate wemzmm timita, tefle Galena, lib. 6. cap. Io. pen/u partium. Ham ut reliquarum par-tiumfimilaritellt ', Idem lib. to. Met/malt mcdemz'z, cap. at. Sen ultimo, 'Ubi barn: wemlrum Marital/I, ced,and carried to the Heart,as the great machine of Motion, which I humbly conceive is firl'c performed in the Veins, by reafon they have their firl't rudi- membrane/21m quart: V ment in the feminal Liquor,before the Arteries were formed,becaufe the Veins firlt received the Blood, formed originally in the ambient parts of the collie; is firfl made in the Vein:~ |