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Show 0f the Thymus. 300k "- Book ll. 0f the Thymus. 699 The fibrils are made of many Filaments. The Wife]: of the Tbmur. And as the Membranes are compofcd of many Fibrils, f0 again every little Fibre is made up of many Filaments, finely tied together by the med1~ _ . ‘ ' of little Tunicles. m:191r‘1hefe Glands are furnilhed with variety of Vellels, Arteries, Veins, Nerves, l ymphxduéts, which are divaricated through their fuhllancc. The Arteries take their origcn from the afcendent Trunk of the Aorta, and the Veins from the Jugular Branches, Nerves from the par virgin" and hub. The I"! 'n- clavian Flex; and the Lymphacdué‘ts having an oblcure origen, do terminate into the Subclavian Veins. Between thefe numerous Vellels is a foft, tender, white fubllance, which rhyma of the Thymus, may be called the (Paremhyma of thefe Glands, and is produced by a Liquor dellilling out of the Nerves, and the Albuminous part of the Blood", the reliques of the Nutricious Particles, which by reafon of their grofnels Cannot be received into the Pores of the Vell'els; or if this Hypothelisdoth not pleafe you, Ihumbly conceive the Waremhyma may proceed from the Seminal Matter adhering to the {ides of the Fibrils in their lirli Rudiment, filling up the Interfiices of the Veflels and Nervous Fibrils. . And if any Perfon fhould deny thefe Allertions, as affirming the fubllancc of the Glands to confifl: of VellEls, curioufly interwoven in variety of P0llures, to which it may be replied, That fome part of the Albuminons matter of the Blood in its Circulation (or Seminal liquor in the ill": Formation of the Fibrils) may accrefce to their Coats, which groweth again Colliquav ted by immoderate preternatural heat in Fevers, and otherdifeafes, and being again rendred fluid, as embodied with Vital Liquor, are received into the neighbouring Veins" whereupon the Glands become flabby, being lelfened in their plumpnefs and dimenlions, as being in part dcfpoiled of the foftfubfiance or paremhyma interlining the Vellels. The Hill we of the Th mm The l‘ttond 111‘: or the Thjmm. The ufe of the Thy/M commonly alligncd to it, is to fupport the divarications of the Aorta, and chz Car/a whereof forne branches are lodged in the bodyof the Glands, and others tranfmitted into the arms and mufcles relating to the Sftlpll/a. Another rife fome Anatomil‘ts do conceive is to defend the Subclavian Vell fels from Compreflion, which elfe might be produced (as they imagine) by the motion of the Clavicles in Refpiration. But rhtfe ufes (if any) are of lefs moment; and I believe the Thymus beinga l‘yllcmof many Glands, conlilhing of variety of Veflels, is ordain- Athiid lift of the lbjmm, ed by Naturelor noblcr ends; One may probably be to tranfmic a thin Spirituons I, iquor by thCVNC‘rVOUS Fibres, into the body of the Glands, to attenuate and exalt the Milky Liquor, of which fome part is carried by branches of the Thoracitk Duétsinlertedinto the fubliance of the Thymus: Deufingim reporreth he faw a quantity of Milk flow out of the Thymm of a Dirlee‘ted Puppy: And other Authors of great Name and Worth, Learned Harvey (Sunder) and Hofliws, relate upon Autopfy, That they have difcovered the Thymus of Infants to be turgent with Milk. Eartha/inc giveth this realon of it, Sine a'rrhio ( air ille) ex Laéi'co Thoracieo illuc die/emit (Shy/u: , ize rapid onerctur Venn fuht/avz/ia. And I humbly conceive the Milk bedew'mg the fubflance of thefe Glands, to be impregnated with. the Volatil Saline Particles of a feleét Liquor def'tilling out of the Nerves; "haul?" the Chyle bring enobled with Spirituous parts, is afterward conveyed into the Subclavran Veins, and Cam, from whence it is entertained With the Blood into the tight Chamber of the Heart. Another ufe may be more clearly evinced from the Mechanifm or {trueture of the part, for the Thymm being chiefly, if not wholly a Contexture conlilling of variety of different Veliels, doth receive and tranlinit feveral Liquors, fome importing Viral and others Nervous Liquor, as the Arteries and Nerves, and other Vell‘els, as the Veins do export the Blood, exalted with Nervous Juice, and the Lymphaeduétsa Serous Lympha Secerncd from it; So that it may feem very probable the great number of Nerves derived from the par virgin/z and Subclavian Plex, are branched and inferred into the Glands of the Thymus, not to give motion or fenfe (with which thefe are not af‘ fcéted in any great degree) but to impart a choice Liquor, which is freely dilpenfed through the terminations of thcfe Nerves into the fubllauce of the Thy/1M; where it being feparated from fome Recrements, meeteth and alib- ciates with the Blood, which is afterward difcharged into the Capillary Veins, whofe Extremitics do hold a due proportion in lhape and file with the fluid Defa‘catcd Liquors. Dr. IVharton giveth another account, Telling us in his Chapter (It Thymo, That the Lymphatduéts receive the more grofs parts of the Nervous Liquor, and the purer are refumed into the Nerves, for the ufe of the Nervous parts in reference tothe whole Body 3 whereupon to do the Author Jullicc, I will give you his own words, which relate to the Nervous Liquor, 141); fltpcrfliix gm [mm in tranfiru per Glmzdulx [uh/lantiam fercrmmlm or per Lymphxdrzilm, [mm/q; liquor per Nerve; I'll eandcm (Ii emi211110: rcfithzitur inparlirtm Nervofamm totiM Carports ufum; But it will be diHi- cult to apprehend this Learned Author's more curious Sentiments, how the Liquors llrained through the finaller Pores of the body of the Glands, as through a fine Colatory, {hould be readmitted in the Extremiti es of the Nerves, and Rem the tide of the Nervous Liquor, whofe current runneth down from the Brain between the Filaments of the Nerves, clean contrary to this Retrograde motion, which tendeth upward and thwarteth the conflant Deflux of the Animal Liquor from the Brain, whofe gentle motion fqneefeth it forward by the weight of the Liquor, as one drop predeth another forward. Lal‘tly7 l humbly conceive the mol't noble life of the Animal Liquor dropThe mall noping out of the terminations of the Nerves, into the fublltance of the Thy- ble ufc of the » Nervous Limm, is to contribute its Mite tothe gentle fermentation of the Blood : The quot in the Glands ofth: Animal liquor being impregnated with Spiritnous and Volatil Saline Parti- 1121mm. cles in the Cortical Glands, and other Procelles of the Brain, is at length tranfmittcd into the par vagnm, and thence communicated to the Subclavia n Plex , into the fubf'tance of the Thymus, where it is embodied with the Blood, and conveyed with itinto the Capillary Veins, and thence into the Subclavian Branches and Veim Ca‘Z/J, into the right Ventricle of the Heart, by whofe repeated contractions the Sumo; Nutritim being dalhed againll: the inward walls of the Chambers of the Heart, is broken into mol't minute Particles, whereupon the fine Saline parts of the Nervous l iquor being embodied with the Acide Atoms of the Blood, do produce a great part of its In- tefline motion, conlil'ting in a gentle etfervefcence and expanfive motion ( much aflif'ted by the Elaliick parts of Air) in which the more Volatil Atoms of the Nervous Liquor do endeavour to quit the more crude and more fixed parts of the Blood and Chymous Liquor, which confine the more Spirituou s till the grofler parts grow refined and exalted, whereupon the Homo- geneous parts, being of a Fraternity , do embody and aflimilate themlelves, for their mutual prefervation, and the difagreeing Particles that can- not be reconciled by Intefiiiie motion, to the Nervous Liquor blended with Another The fourth nib of the 7 hjmkt. 319% |