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Show 156 of. Of the THORAX, or BREAST. Of 2‘53 THORAX, or BREAST, 167 The Contained Part: are the I'de;{jzy7£;zzzliz, the Lungs, the Hears, the Pcrim7‘dium, and the great Blood-rot Hr, of which lull: in their pros per Places. . . The Bums rs. of wh1ch, thol'c in Women, need only to be ccnlidercd, are very well known, as to their Shape, ; the Size, in youngr Girls, is hnall ; it increzifes at the Age of Puberty, becomes conliderable in preg. mint women and Nurtcs, and de tones in old Age. The HEART is a hollow Mulch: ofa conic Figure, which may be looked upon as the princrpal Organ of the (.‘ircuiettizinof the Blood. The larger Part is the Ba/yr, the irnailer the/1pm, or Form Its upper Part is mm" ; its lowerflatfi/b. its bituntion is almor't "mg/(mm or rarmmal; mlonruch that its 1?qu lies on the right Side, and the flfex with the greateit Part of the Heart, on the left Snie of the Bread, where its Beating is perceived. At the Balls of the Heart are two {mall l'urfes, The Nirvrr. is perforated. wth l‘everal Holes, which anfwer to as many Tubes. from whence the Mill; is. dzlcharged. The Skin round about it forms a dnky Circle, which is called me flrrofa; in Virgins it is more red than in others. Within the Extent of the fi'mla arc which {com to be flfipmdiz'rr, called the right and left fl'zrrz'c/z'. of which the rig/21 is much the largcl't. The Situation of the [/2 is [ml-mad, {everal fireman: Gx'anir, placed on the internal Surface of the Shin. anl'wcrs to the Vein which dil‘charg) ~ itfelf therein, and the other to it: proper l/entric/u. Each Anricle an "s of :1 double Row of fie-[by Fir 1355 Page 12 and 22. ‘ The glztndnlous Body of the Breaft copt'iins in its middle and anterior Part, a «coldly and {Mu/m- "m'r * ..ich {coins to be formed of the All‘cmhlage of {everalcxeretor'y tubes, which proceed from all Parts of this glandulnus Porly. 'l‘helc [diffs] 7171'" are {lender atthtir Origin, and are dilated at thi Place, where they make, by their Union and Communication, a Kind ofReRrvoir, \s'heie the Milk is prc'crtcd ‘till it is taken up by other Tube-u which are about eight or ten in Number, and which proceed to the Nipple. The lit/myZ/m of tlrtfc Tubes are filled with a Kind or a lpongeous Web, and {everal ligrimen- tous and elafiic Filaments, which run nccording to the Length of theft Tubes. 'l‘hc Nipple has an Cqullliite Senfntion, which makes it grow fiifi", when it is handled, or in giving Such. The PLLURA is a {mootln dole, firong, tcntre, Membrane, They have each two 'QrL/frrr, whereof one in‘cs, which are generally femicircu; H'. and are ttrcngthened by others, in the Shape of columns, between which there are coniidcr‘able Spaces, uliitli ferve {or the Conflrié‘tion and Expulfion of the Blood from the I Heart, when this lalt is in its Din/3015. 'l‘lie VENT‘UCLES are two remarkable Cavities. the one "El/i": and the oncr /;ft. The right is thinner and weaker, and generally more 'capa‘ cious than the left; it receives the Blood from the few Carm and rig J: Await/E, and drives it into the pulmonary Artery and the Lungs. The ilgfisttronger and thichcr, and not lb large. it receives the Blood from the ‘12 ' 3i Vein. and the [5/2 Amy-1e, and forces it into the Alarm. The rig-[wt [ml/1rd: is fitunted in the tlfllfi‘icf‘ Part of the FT/fwornx, and the left] in tnc payicriir; wherefore they are belt diilinguiihed into anterior anti iii/sirwr. _ to the Ribs and intcrcoital Mutcles, and lining the whole Lzmty o: W750nm. It is always covered with a Serofity, which oozes from Pore-=, and outwardly is covered with a cellular Web. ‘ that the P/mnz makes :1 Fold over againfl the yer/"57713 r" , which terminatcs 0n the whole Length ofthe 513/722: 2. Q is 1:0 called the lVlRDIAxTIN'UM ; it {operates the Thorax into two (Lav the one right, the other left. It does not adhere to the Middle of m: Srewwm, but more to the left, whence the right Cavity is largell. The Ufe of the ilr'rrz'z'aflz'rzsm is to hinder any fluid flied on one i from pafling into the other; to prefcrve Reliviration free on one bid" when the other is hurt ; and to hinder the Lungs from ll‘iCUlHlncdlila' each other, when we lie on one Side. The THYMUS is a glandulous Body, very large in born, {sated in the {uperior Part olthe Thorax, irriiricr'.a..'ly . Fro-mm. lying on the l'ericartlinm, the 'l'runl' of the xf'orm, and t pcrior I/ma Cow, reaching to the Beginning oftlae (nrm‘ir/t, an times to the T/ij; . '9 (It/and. Its Figure is various, its '31 o tlclhy, in Adults (lfLI‘KCF. In Children it is non: three lnthcs long; V1 grown Pcrfonsit nimolt vanilhcs. and of the rig/J! forward. .lts Life is uncertain. The PERICAKDIL‘M is :1 llrong Membrane that enclt'liefi ‘ll': 7i like a l'urle, but leaves firfiicient Room to the Motions 0 am. It is connected to the rWMYM/Q'z'nwrz, to he Dinphmf 1*, and tort: 3"?" Veflicls of the Heart. It contains a Liquor to lubt e the 51"" face of the Heart, and ferves to fullninir in iCS proper Plate. rr‘l.» l , \l‘ \ -I\\ Hum \I The COLU‘JNIE CARNL'JR are both in the sz‘rz‘a'z: and the A'urz‘c/ur, and arc to many l'mall nilulclcs, by the Concourle of whole tondinons l'ihrcs are formed peculiar E‘rlembrztnes, called 1"" r placed at the Oil» titer of the Auritscs. Thole ("a/mum run tranl'vm‘fely from one side of the Ventriclc to the other, partly, 1. «.t they may shill the Contract ion o. the than in it.) Qty/m, and partly to prevent their tOo great Dilata- tion in the Brig/[6]" the V3.1 yrs arc ofthree Kinds ; r. Torr/612' ' l, which are three, and are pitted nt t‘r-z- Orifice tit-the rigi'v 1".»fo ,wl cn nnlivcrs to tlicAuricle on the lame hide. 2. 'l‘wo rl/iifral, which are litrratcd at the by? V1.77- {2112'}, where it communitntz-s with the left sluricle, preventi ng the Re. :urnot the lllooz,l from the Heart into the \ cins. 3. ,l‘llTCC/Emildilai‘? Knuth are placed both at the Beginningr of the z/U;'.‘(Z and the pit/7220715123? "WU, hindering the Return 61‘ thcil'llood from the A'rtn-ie: into the ,1 .ilfil‘f. "It: iw'lUSCULAR FIBRES of the Heart have a wonderful Structure, In [he 15f: Ventt‘icle there are [brig/J; Horn, and thcrc arefliml com- ill'"l9 both. Thole are ofa'drrnble Order; the rxz‘uvzal, which run min the llafis and 'l‘endon of the Heart towards the left ; the z'nrrrzsaz', i "ll l'un towards the right, and interlett the former. Vthn they rift, . "' COlllll'iuge the Cavities very revulnrly, and expel the Blood ; this i milled ti"? ‘UL/EO/e Ofthe Heart ; when they are relaxed the two Ven- L V5,," are dilated, and this is called the Diana/e. "th An moms are two hollow Mulclcs‘, which are the Airfagaxfl: Cf" \\.henmlh~1diii f9" they contract while'the \ cntricles are dilated,rrtne 11: \ tutticlcs contract they are dilated. Int; rumsc .i |