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Show j, ,L_,r Book ll. of the Heart. Of the Vtizirztlcr fm . , , _ /_/_"' ,_ , ‘ r ,, a‘nks A _ ,, lo feqttd,.that the Dilembb The Columns havmg this Pabnck, art the \ entricle, that trey cmg of {ides the from mig ht keen fome difianee the Fibres Oi tlie Columns ‘L's lifted up inI every 8 vf'tole of the Heart (by reafon - le, and-he - are relaxed ) might hang crofwife in the middle of the Ventric might in: beaten backward by the Retrograde motion of the Blood, they e of reeotirl the up flint might aneS bell‘o expanded, that the extended lVlembr obferhave s Author d Learne foine as Cow, the of the Blood into the Orifice ved. And if thefe Tricufpidal Fibres [liould immediately arife out of the fides of the right Ventricle, and lean clolely upon the inward fur-face of the Heart, Ventricle in the thicknefs of its Walls, and greatnefs and firm th of 't fleiliy Fibres 5 and the Carnous Columns and their appendant Mgmbranelss do much tranfcend the like'furniture of the right Ventricle in largnefs and "WW-"1‘5" firinziels‘, by reafoln as the Vibration of the left Ventric le is much iglhiii'ilfliifd more impetuous in t ie Syflole, f0 it is re uifite it {hould h r "murals" Fibres, as fironger inllzriimcnts of motion 20 {Main the v'igiiguéreghlfafizfiisy mm. made by f'trong contrat‘iions of the Walls, encircling the left Ventricle iri order to throw the Blood into the Orifice of the Aorta, and leall the Vital Liquor {hould have recourfe again out of the common Trunk of the teat Artery into the left Cyflern, and out of it into the Limos. vatcd 3 whereupon the Vital Liquor would return by the fame paflage it was .1" admitted into the right Ventricle. and lo fi-ul'trate the dengn of Nature The Great and All-wife Architect hath appointed threat: Membranes adorned the Cirorder to tranfinit Blood into the Pulmonary Artery, to make good le. Ventric theleft into Lungs the h cuitof Blood throug e This Hypothefis is grounded upon the drawmg the Cone toward thC‘Baf Fibres idal Tricuip the of nts Li‘gainc y the of the Heartin its Syilole, whereb and that of the Aorta 5 So that the Blood by theinterpofitio n of thef: Flud: gates cannot have any reflux out of the left Ventricle into th e Lungs, nor out of the Aorta into the neighbouring Sinm. The left Ventricle is accommodated with far greater Mufcul ar Fibres Tilticfivfll‘ and rence to thcfe Anatomifts, I humbly conceive it more confonant to Autopfy, that the fides of the Ventricles are brought nearer each other in the Syftole 0f the Heart (and n0t the Cone to the Safe ) So that the Ligaments of the Valves are not relaxed, and the Membranes dillended, but the Valves eve; ry wav encommfiing the Orifice of the Cart/.2, have their inward CaVities contraé‘ted and rendred clofe by having the fides or the Membranes nearly to meet each orher by the Syl'tole of the Heart 3 So that the Valves become as Damms intercepting the current of Blood in its motion toward the entrance of the Cari/:7, and promote it toward the Orifice of the Pulmonary Artery, in order to import it into the Lungs. tai- fcnflhc Of the Ventrit/er of the Heart. and thereby be Clethey could U not be receptive of the recourfe of the Blood, are conceived to be relaxed, and the Membranes expanded 3 but With defe- {Lift‘csild‘l Book ll. Hence the life of thefe Tricufpidal Valves may be cafily difcovered if the Hefhy Colmuns, fwelling out of the fide of the right Ventricle, be curioufly confidered; and an injeétion of Liquor being made into it by a Wound, you may difcern by thecontraétion of the Membranes a Daintn to be made at the Orifice of the Vemz (117/4, upon the motion of the Imeé‘ted Liquor towards it.' Thefe Valves alfo giving a ‘clieck to the Retrograde motion of the Blood, do make a greater mixture of the Chyme With the Blood when it is dalhed againlt thcfe Membranes, and fo forced by the Syllole of the Heart toward the Orificc of the Pulmonary Artery. ‘ ' ‘ i , ‘ ‘ g with a Semicircular Figure, finpping the Orifice ofthe Pulmon ar Vein deeper Fiflures than that of theright, that the Walls of the Hearti ' h) "warm . {trongl .v y contraéled in its Syfiole , that the inwaid be more ‘ - Surface ‘ s ofmgthet fixings ?" Ventricles might be brought nearer to each other; and therefore Nature "gm. hath ailzgned more deep Fui'rOWs to the left, becaufe more {trong Vibrations are requifite in this Sinus to impel the Blood more briskly firlic into the common Trunk, and thence into the afcendent and defcen denthrunk of the Aorta, and by their branches, into all regions of the Bod . 'Anid became theITValls of the left Ventricle are chiefly made up of oblique The mrtnot gigquae : :fl‘ he: \y:itixiiccqca're every way contracted into themfel ves to make Erwicfiftiiir' . .0 meet, which could not be f0 clofely performed In": Ventridc. and the inward Surfaces of the left Siam be brough t fo near to each other, unlefs thefe deep FiHiIres were fitted for this motion. , In the left Ventricle are feared the Mitral Valves, which in truth are "BMW" Membrane . ' ' . Val end en- 5, akin to the Tricufpidal Valves, and are endued With no camisarstiic regular Figure, whofe Margents are waved into various inequalities, no 53:150er ways refeinb ' VCm +- iiuga Mitre", and do encircle the Orifice of the Pulmon ary rcr‘ *7 ‘5‘ 17‘" The Carnous Columns 1- feated in the left Ventricle, are adorned with a W i;- F IPyramidal Figure, whofe Bafes encline toward the Mitral Valves, and their frii'clcimo. Cones toward the Cone of the Heart. (mornings:s The Ligaments fpringing out of the heads of the flelhy Columns have giigfrfiiiltg: Having given fome account of the'rlght, ' I will now endear/our to The"! iron-moi. you a profpeét of the left Ventricle", "which tak'eth its ‘rife‘ in' ailarge. Bafe, riitlc hen- tiicimiii and Gradually Terminates into a Con'e‘,; fomewhai‘jtéfemblingr- that Of the 1"""""""‘1' Heart ,.And as to the inward furface of {theyventfiaflli' it is th'ffled With‘afl Orbicular Figure, by reafon the Scprzzm, (relatingto'lhe'.iii'i‘vard Receffesof the Heart) featedin the left fide, where it, formeth.the'rlghtffide of-the lefi: Ventricle, is, endiied with a‘Concave ‘Sdrfhee,"and‘hot 'Widi'fi Convex, as ' ‘ , 3. 'i t , ' . it is found inthe right Chiu'b'e'r‘: of the Heart, "V. -'~v I . ) The left Ventricle is entitledr. with around wallofian eqtiaf'rhickiicfé, and lefs in compafs inimihftfibf Latitude,.ahd greater "in length; than the ("'01 three, 01‘ more Bl‘anChes inferred into the Mitral Valves 1-. , gay} n The ufeof the Mitral Valves is, to hinder the Retro rade motion f h "id-7' H Blood out of‘ theleftVentricle of the Heart , into the {f'ul [nonary . Mechanifm. of the Valves cloth cl early denote the , as the V611], 0' t ase Ia avcs, 'l‘ll‘cufl'or‘m h immure the Orifice of the Pulmonary Vein 1-, which is {huffuf ivtirdfe‘ii/hed: "Jr-"the {ides of the Valves are brought near each other by the compr eflion of "A the Walls of the left Ventricle in the Syflole of the Heart, wherein the Reflux of the Blood is intercepted (by the clofel y-conjoyned Membranes of the Valves)f 111:0 the Pulmonary Vein, and the Blood impelled into the open Parts of entran ce the 0 god); t e term, to make g 00d th e mo t'ion 0f the Vital ' Liquo ' r into ‘ all ' ‘ right Ventricle. Theleft Chamb'cr‘b'eing ;co'iifigned byNature1.5072,Z fironger'iimpulfe of the Blood, as it is imported by the great Artery, and its greater and lei; Branches into the remote parts of the Body, doth Very much exceed-the right 1 ' ~ '- i ' Ventricle The Semilunary Valves lodged in the left Ventricle of the Heart are part- naryValvcl "5mm" 1 y made u p in i tsv lovrei v - Region ‘ . . . of many Semitircular Fibres, and in their ofthc 1st Upper with many right fine Fibrils, filling up the Surface of thefe Valves 1- ¥;"f"‘l ": witru'af' " |