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Show 0f the Lungs. Boolt ll. 3i Book ll. 0f t/ac Lungs. times thele Lobules are affixed to the extream Angles ofthe adioyning Branches, that their due Situation, Union, and Connexion may be prefervcd, whereupon thefe Lobules are feated lometimes in the lower Region of the Windpipe, and other times in the {ides or extreme. parts of it. A . Next to the Lobules, their Interfiices prefint tliemfelves, as the lubycc'} whichaccrefciugro the Sidesa and extremities of the Branches relating to the Wind-pipe, and do terminate into unequal Ame and Veficles. of our Dilcourfe, which are not meerly empty Ame, but areendued with extended Membranes, fometimes parallel to themfelvesy and lometimes an. gular, which are not propagated from the ambient parts of the Lobnles ( feared on their fides ) but from their more inward Recefles : And bethen (ms of the Afirem Arteria, that the Air might be in one continued fiream, and flow into the numerous Pipes and their appendages, for the more eafy in- And it is mof‘t confonant to reafon, that {the membranous Sinu: fhould beacontinuation of the inward Tunicle of the Bronchia, and that thefe nu‘ merous curious Receptacles of Air {hould be appendant to the ramificati- grels and egrels of it in infpiratiori and expiration, of which the one is ce- thele Membranes, filling up the vacuities ofthe Lobules, many minute Blood. velltls do run, and are derived from fome, and are implanted into the ad. lebrated by the difiention of the Pipes, and theirappendant Siam, and the other by Comprellion, made by the abdominal Mulcles, and weight ofthe Lungs, and the Contraction of the Helhy Fibres, befetting the A/pem Artem joyriing Lobules : Into thele Membranes interceding them, the Air is received as into more large Simw, which have a mutual entereourfigthat the recei- and its adjacent Sim". ved Air out of one Cell, may be ejected into another by Compreflion 5 {0 that theft" Interf'tices, interlperling the Lobules, are nothing elfe but the membranous Velicles of Air, rendring the Arm tranfparent. Thelc luterltiees clil‘tinguilhing the Lobules from each other, are molt con~ fpicuous in great Animals, and do equal in Dimenlion half a Fingers breadth, and are conducive to the dillinétion, and connexion of the Lobules, by whole interpolitbon they are Limited 3 and when thefe Interljtices, or mem- branous Cells are dillended with Air, they do Rraighten the adjacent Lobules, and allil't the mixture of the Blood with the Chyme. In thefe lnterllices feared between the Lobules, in difeafed Lungs, may be dilterned the Hydaridcs, which are the membranous Cells filled with watry l‘teerements, inflead ofAir, which produeeth a difficulty of breathing. And if any {crupulous perlbns be not fully fatisfied, thatthere are any liich Lobules, or Membranous Sillm interceding them, I would advife them for their better liatisfaé‘tion , to view the Lungs of divers Animals (newly killed) while they are warm, and then with GlallEs, if not with a naked Eye, may be dilEovercd amultitude of linall orbicular Veficles diliended with Air, and maybe farther difcemed in the emptied Lungs, cut through the middle, which then are leis confpieuous, and may be better few in Lungs blown up and dried, by realon the round membranous Si/mr maybe clear» 1y difcerned in the outward liirface of the Lungs, and in the Dilleeling of them, may be clearly viewed the off-{pring of numerous hollow Membranes, dillended with Air. And this Hypothefis of Lobules, and their Ame, garnilhied with orbicular. Velicles, may be proved by injeéling water again and again, into the pulmonary Artery, whereby the Blood is dillodged, and the Sanguiduéts wafhed clear, lo that the whole fubl'tance of the Lungs may be ren- dred whitilh, and almol'r tranfparent, as divefied of its opace Scarlet Robe. And when the Lungs are fufliciently walhed from the fiagnant Blood, the Water may be ejected by a gentle Cempreffion, and after a quantity of Air being immirted by a Blow-pipe into the body of the Afpera, and its numerous fmaller Pipes, and the Lungs dried in the Shadow or Sun, you may plainly fee, not only the round tranfparent Veficles, feared in the circumference of the Lungs, which being cut, you may alfo infpeé't the White Compage of the membranous Cells, making the more inward fubftance of their noble machine of 'Airt Thefe thin Cells of Air feem to be framed of the fine inward Coat offhe Bronchial, which being varioully difiended, do produce the Airy Sinai}; whic This may feem to prove this Hypothelis, That the membranous Cells are the ofilfpring of the inward Tunicle of the Wind-pipe, becaufc in dried Lungs, the inward Coat of the A/pcra Arteria, and its appendanz Sinus, have the lame fubllance, colour, and tranfparency. The Lungs are furnilhed with many fmall Glands, feated between the reticular Tunicle of the VelTels, and the inward coat of the Bronchia, and the me of thefe Glands is ( as I imagine) that they may feparate the Lympha from the Blood and nervous Liquor, and carry it into the Origen of the Lympheduéts, and afterward convey it into the fitbclavian Veins, and mix it with the Blood. Thefe Glands, I conceive have another ufe, as being conglobated 5 whereupon fome part of the Lympha ( asI conceive ) may be tranfmitted through fecret Pores, into the Cavity of the Bronchia, and membranous Veficles; left they {hould be too much exficcated by the heat of the Blood( pafling through the Bronchial Artery, into the fubl'cance of the Afpem Arteria, and its Sims) {0 that they cannot be freely difiended and comprefled without Laceration, in the Ingrefs and Egrefs of Air, in Infpiration and Expira- tron. |