PHYSIOLOGY 



not Olllv in .ill |i:nt ,! nf ili. I\I(Y |, Ml | <( n l| p ; i|f;; .if I IK- |ie;irt. ll j; 



e\ i.ieni t luii the inn .1 ui.it ii ic i if t lie he;ni ii to bt compared, n..i \\n \\ ,.K, lei.ii 

 muiole oompoflid -i man} iii.n-s. i>u< i, .1 ifagli muiole tiine m \\ineh nil 

 in inn. I!MI,;,I , ontinuii \ . 



THE BEAT OF THE MAMMALIAN HEART 



"I'll" mMmmulian heart, like the heart of c-l.l Mn..,in| animals, \\ill 

 Eoi "me time after it has been cut out of the I><<1\ . ;m<l M perfectly ih\ilnmc 

 .H 1 1\ 1 1 \ HUN be maintained for houri by I'mim;^ the he.ni from the ooronary 

 ea either with deAbrinated blood or with oxygenated lu 'niin. 



\\llll <M \\illinilt I IIP il.hllllnli nf ;'.ll|OOSe. 



llioil cells ;ur I. HI n< I in Hie m.-mmi.ili.m in ,nl ; m>im<l I In- . .|>. mil". . . .1 fix 



\<m . (millet <i fhe mil -I .mi i. ui ii ((.HUH. in HI, between auriolea 



.I'l.l MMltriolcB, !ml III I he I'. i .ll p;Hl M| flic 



The ventricles of mamm; 1 1 an '-lulMwril \\iih n gteatei iliviliinu- p..\\.M 

 lir r. M M |. ..i iding cavities in the frog n ml tortoiie, l( il |...iMp < ( . 

 sever or crush all the nervous aixl mnsmliii oonn tio&l ln \\.M-D auriol 

 \ i licles without destr-\ ing iin-n t&eohanioaj oonnectiofl i>\ meaa i -i iiiu.Mis 



lisNUC. Such U |>I.M r.hil.' <lne ; Hot, CVCU for !l inoinrnl . -!np 1 lie null l;l. ( h'li 



of the ventricle, vfhiohgoonbeatingataroythmwhiohii ind.^xMKieni i .m.i 

 ilower than that of the auriolei, Port(M h.-i ihowu HUH .1 tnew Eragmenl 



<>l llio ventricular \\;ill. perfectly fr ( p h.in gangliOD Oelll, m;i\ in;unl;iin 

 i li\ I hi 1 1 ic conl uirlinns fi s.nne 1mm,; i f jVl l\ :in :n I ilu i.-il . 1 1 . nl:il ion I h i 

 a branch <>l lln .mn:n\- ;n! i\ \\ e ni;i\ i h, nclnde ||i;it in lln- 



in:iniin:iliMii M in Ilu 1 JiinplnlM.'in hejiit, the . .111 .. ..| ihr ili\||un [fl to l>r 



mi" iii in the properties ol the \\\\\ ;! iiim\-: i hem ..-i\e .. ;m(i \ \\<.\\ ever] p.n i 



! the he. ill mil'-, le p, llie p.\\n nl lli\llillil. ;i. I l \ 1 1 \ . I 1 le n.uni;il 



;.(Mji|eiiee n|' 1 lie I)e;i1s IxMll". i|p< el lilllie, 1 lt\ 1 hr ;'.le.itei linpien.v .'I I he 



natural ih\ilnn >!' ihc renou ; <"<! i the h.-.m 



lu the ni;unni;ih.in M m I he ;iinphil)i:in li<\-nl. t IIP e\.n.i!.M\ ..Mi.lilion 



|'.)inl in (he m,i ,1, .|>i< .1,1 . I hi.Mili t he inn .. le in ;ill .In.vli.ui:.. 



;ind Ihe pini. QJ . .indni 'linii nl exeilati. tO I" 1 m.lepen.lenl i| nerve 



Ill'l, I'll, . x.il;.ln IN pi,', , ., IM.IN he , nn.lllel,-,! llnl ,.|ll\ 1 1 1 1 he , >!( 1 1 1 IM1 \ 



[OB IHMM :nnieles ( \enl IK les. Im1 :il,;n horn venlnele; |, jiniirhv-. 

 II Ihe \enln. I. HIM I :i1 :i ill \tlnu nl In-- lie i he ( |nen, \ lh;in I he n:iHn;il 



M hi. h i I he \ennn , en.l nl Ihe he;iil. \\ e nmv nll;nn :i 



> 1 ih\ I Inn in \\ Inch I he nnler nl lh<> 1. .inn, le : . 



Illlirillt in e.MKeixe nl :in ;) I i .1 1 1 -ei nenl nf iieninns \\lllch \\nilld p 

 Mle nnpnl M - mipMituilK 1mm ;nn lim,, \, -nlii. 



;illllc|e;;. Slich :i cnn.lilmn \\nnhl ;-eem In le in cnlil I ;i, 1 let inn In 1 lie l:l\\ 

 nt lni\\;il,| .llle, llUl \\lll. ll nl.|;llli, 1 h I Ml; -||.)| ll | lie liei\nils <,\ Hdll. Oil t h<> 

 nlh.M IKIIM! the pheiinmcn;! .lie e.t )|\ e\p|;iin,,l nil 1 lie M.-ninpllnn thill the 



\\lmlc ni i in* musculature .<( the i m niMiix n 



inn., le hl.ie. .ilnn- \\hleh Jill e\.ll ; H.M\ pmee-- ni;l\ 1'e pi ,,p:i ;.. 1, , 1 111 jin\ 

 I0n, I'Ut m the .-i.lull in:nnni;ih;m he;iil. nn mperficial dissection, 



