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Show Book II, 793 Of the Lungs. Book II, 'I'hrfi'cficlés_ Thefe oblong Tubes have many Membranous appendages, aflixed to them iiifilrrsilgm as fo many Outlets and Receptacles ofAit, which being big With it, do Ve- E;:";';;§,fi§ ry much enlarge its Perimeter. . That [may give a more full I-irfiory of thefe Membranous Cells, rela. ting to the Lungs as a Machine of Air 5 I Wlll Treat oftheir SltUaElon,Con. ncxion, Figure, Origen, Termination, Suthance, and Ufe. Thefe fine Cells are feared every way near the Bronchia, as {:0 many 3?. Ef‘fé‘gfig or Air. pendants ofthem,and every Cell hatha double pailage,an Egrefs hominid In. grefs into the Bronchia,to give the Air 3. free play in and out upon infprration and expiration. The tonnexi- Thefe Membranes or Orbs of Air are connected to the {ides ofthe Bron. £33351" chia, as being a part of them, in reference to their continued inward Mem. branes, and do participate the fame firuclture. Tlicorhitular They are adorned for the moit part with an orbicular Figure, as being 3.535533: the befl and moft capacious , wifely inf'tituted by Nature ( as I cort- w‘s' ceive) for the greater reception of Air in infpiration, and the more eafy excluiion of it in expiration. . . 7,, {Wm Thefefine round Machines of Air take their Origen from the inward coat O‘W'WJB- of the Bronchia, as being alike in Subfiance, Texture, and Ufe. So that thefe round Cells, or membranous Expanfions take their rife from the inward Recefl'es of Air-Tubes, and are propagated through the whole fubitance of the Lungs, and at lafi terminate into the Coat, invel'ting the ambient parts of the Lungs. The fiihl'larrc The fubltance of thefe Orbs, which confiitute a confiderable part of the (rlllC Vtiitles or it", Lungs, are chiefly Membranous, and are a fine contexture made up ofnumerousFibrils, pafling in various Right, oblique, and tranfverfe Pofitions, which give firength to thefe thin Expanfions, which would be lacerated when difiended with Air, were they not framed of many Fibres, made in different poilures, clole firuck, and curioufly interwoven with each other. $133321?"- Thefe receptacles of Air are not only endued with membranous Fibres, (luulniih butflelhy too, which beingannular, as thofe ofthe Bronchial, are derived M" W" from them, and have a power of contracting thefe Cells, to fqueeze out the Air in expiration, and throw the grofs Chymous, or phlegmatick Matter lodged in them into the Bronchia, in Coughing, and afterward into the The ufe nfthe Ingenious Dc: Cam-r conceiveth thefe Velicles of Air, according to their '"mbmuu‘ variety of Figure, to be configned toa double ufe, the one to retain the in-- The pulmo‘ nary Artcryr 792' encircle the fmall orbicular Veficles, and fliading them withafine Network do fwarh their circumference to enliven and corroborate their fine Co‘mpa e) The pulmonary Vein borroweth its rife from the fuhf'tance of the Luriggs in {mall Capillaries, encompailing the Veficles of Air, belonging to the Bronchia, with fruitful Ramulets ( accompanying the Arterial Divarications) fpired Air,and the other to expel] it; Thefe fentiments ofthis Learned Author, are more witty then profound,by reafon both the Bronchia, and thefe appendant Cells of Air are confiituted by Nature, Firi't to be Receptive, and after to be Expulfive of Air, and not to have a dif'tinét Office, at the fame time to be fomc of them Repofitories ofAir, and others to throw it out in expira- tron. The Pulmonary Artery fpringing out of the Right Ventricle ofthe Heart,and inclining toward the Bronchia,is divided into a Right and Left Trunk,out of which do fprout on both fides, an innumerable company of minute Bronchia ( making numerous inofculations) Aflociates of the divarications of the Bronchia, and are afterward difperfed into the Lobules of the Lungs, and being alfo companions of the Bronchial Artery, and pulmonary Veins, do of- ten touch each others Coats; and making great Complications, do at 13 encircle The pulmOu nary Vein. Which often uniting, and parting again after a (mall diPtance, do makea kind of reticular Plexes, or Mafshes ; thcfe pulmonary Veins do anfwer thofe of the Arteries, almol‘t in number and order, and do much contribute to the fine contexture of fmall Veilels, with which the orbicular Cells are enamelled. And the fubi'tance of the Lungs is not only framed ofnumerous Divar'ications of Arteries and Veins, but of Nerves too, which do take their Origen from the 'Par Vagltlll, or eight pair of Nerves, and are propagated not only into the cu:ward Membrane,enwraping the exterior parts ofthe Limgs- but are alfo dii'ttibuted into the body ofthe Lungs,and do alfo aflociate with the pulmonary Artery and Vein,when they make their Divarications over the furface, and over the orbicular veficles of Air. The Lympheduéts of the Lungs are fmall Tubes, clorhed with molt fine Diaphanous Tunicles, which are affixed with minute lWembranes to the Coats of the pulmonary Vein, and then tend to the inward recefles of the Lungs, and after pafs out of them, and are atlalt inferted into the Common Thomcick Channel, into which they difcharge their Lympha, the recremem of the Blood, ( feparared from it in the fubl‘tance of the Glands which are very numerous in the Lungs) and is afterward conveyed into the extremit of the Lymphedtiéts. Y If a greater infpeétion and deeper fearch be made into the fubflance of the Lungs, the Compage of them may be difcovered to be in part conipoled of numerous Lobules, of which every one is immured within a proper Membrane, diltinguilhing them from each other, by feveral thin Walls as f0 many different boundaries. ' ("Tillie-f; {mall Lobfis of thE Lungs, are endued with divers kinds ofBloodve of e s,theurm es Bmmlgia in .t em wit many Divarrcation ‘ ' s, accompanying ' the branch- The Lobules may be difcerned, if the Lungs be blown up, and held up agamfl: the Light, whereby fome tranfparent Interltices may be dil'covered ( according to moft ingenious Malpiglyim his obfervatiou) whereupon Wind-pipe, and Mouth. ' (fell, alCUUlv mg L) :12: Carter. Of the Lungr. gentle incifion being made , and by tracing the Interflices, the L0-a. bules may be .found adhering to the {ides of the Bronchia, and Blood-Veil ff‘elsJ from which they may be fevered with a tender touch, and may be een to be invef'ted with proper Tunicles; and in truth are nothing elfe ( asl humbly conceive) biir. many Syl'temes of various Veffels, confined within peculiar Coats, for the better [ccurity of the numerous minute Veil leis ( branched through the body of thefe Lobules ) and to keep them in a due order, for the better circulation of the Blood. ~ The Figure of thefe Lobules is in fome fort Conical, as having greater dimenfions in the middle, and ending into an obtufe Cone, refembli nq fomewhat ofa Cyptefs Nutr L And it will be difficult to delcribe the Situation, Origen, and lnfertio n of the Lobules, by reafon they are branched with the appendant veffels on every fide or the Bronchia, after the mannerof the branches fproutina out of the trunk or a Tree; and thefi: ramifications, are terminated into i'he outward furfac: of the I rings, which ought to be plain and equal; and fortieT 9 times The Nervci of the Lungi. The L1 mphe. dufls of the Lungs. |