10 a-pt ME^inanHH r. ioch*obi. 



ySijiHTbCfl BT. cymecTBOBaHiH hbjxi, noJiyjiyHebixt KJiananoBT) (cm. pnc. 4), ito ji,0Ka3biBajn> 

 Ranvier. BejiHKin OTpHi;aeTT> 3to, jTBepKAaa, mo pojib KJianaeoBt nrpaexx qacTb crtHKn 

 jiHM<6aTHHecKaro cepjma, jinmeHHaa Mbiiiin;^ h BbinaieeHaa bt. Bw^i.'fe KOHyca bi npocB'feT'b bghm. 

 Ha BepxyraK-fe Koeyca naxoAnTCH OTBepcxie, AonycKaiomee toki jinM<i>bi BT>BeHy, ho ee oSpaTHO. 



OTHOCHxejibHO BXCAHbiXTi OTBepcxiH, HaxoAHmRXCfl B^ Ka3Kji,0MT> nysbipbK'fe, a npHraejn> kt> 

 cJi^AyiomHMi BbiBOjtaMTj : KaatAbiH nysbipeKi CHaSmeH'bAByivia HJiHxpeMa BXOJtHbimn OTBepcriaMH, 

 HaxoAaoiHMiTca bi saAHeft qacxn nysMpbKa, meacAy yxojiin,eHHbiMH MbiraeiHbiMH xpaCeKyjiaMn 

 H aa noBepxeocxH, oSpaineHHofi bt, 6pK)inHyH) nojiocxb. OxBepcxia 9xh n.nn mejin aacxoJibKO 

 Be.iHKH, qxo MRfe nocxoaHHO yAaBajiocb npoBOAHXb qepesi HnxT, qejiOBtqecKin bojiocb; KjanaaoBx 

 y 3XHXI OTBepcxin a ne aaxoAWJi'b. Ranvier HaxoAHJixMHorooxBepcxin h aasBajT) ttxt> jinM4>axii- 

 qecKHMR nopawH, npo6ypaBJieBaK)iii,HMn koco cx-feaKy nysbipbKa, ao ae HMiwmnMH KjraoaaoB'b. 



BejiHKiH, He ynoMaaaa o qacjii BXCAHbixX) oxBepcxifi, yxBepatji.aex'b cynjecxBOBaaie npn 

 HHXT> KjanaaoB^, noAoSabix'b x'feMTi, KaKie OHt aaSjiioAaji'b y BwxoAHbixT, oxBepcxiw bt, aeay. 



BxoAHbia oxBepcxia oxKpbixbi bo Bpeiwa AiacxoJibi, KorAa MwmeaHbia xpaSeKyjibi yAajieabi 

 ApyrX) oxT, Apyra, ao bo Bpeiwa cacxojibi, KorAa xpaSenyjibi conpHKacaioxca Apynb c^ ApyroMX., 

 OHH saKpbixbi. Hxo6bi saKoaqHXb ct aHaxoMHaecKHMX) onncanieMT) cepAem>, acKaacy ntcKOJibKO 

 CJOBT. *acHiaxT>, noKpbiBaioniHxi nysbipbKH CBepxy vs. cnnsy h hjiotho coeAHHeHHbix'b co 

 cxtaKaiwH nysbipbKOB'b na M'fecx'fe conpHKOcaoBeaia, 

 <f>acain, Ct, Aop3a.3bBOH HOBepxHOCXH nysbipbKH noKpbixbi fi>acn,ien, aaxaayxofi HaAT> xpexyrojib- 



noKpueaio- 



miH jiHSKPa- HbiMi npocxpaacxBOM'b, BT> KoxopoMi noMCBmaioxca cepAU,a. Bx. 3xon <i>acHiH aaxoAHXca H-fecKOJibKO 



THHecKin 



cepAua. oxBepcxiH, AoaycKawniHX'b npaxoKTi .iiHM*bi kt> nysbipbHaMx hstj 6ojib[uoro noAKoacaaro cnHaaoro 

 jiHM<i>arHaecKaro M'feniKa. Bt> oacuin, noKpHBaiomefi noBepxHocxb nysbipbKOB^, co cxopoabi Spioni- 

 HOH nojiocxH xaKJKe naxoAHxca oxsepcxie, AonycKaiomee npnxoK'b jiHM<i>bi asx. 6ojibmoH saSpioni- 

 hoh nacxepabi, <l>acitiH ocxaB.iawxx, aenoKpbixbiMH saAaia aacxa nyBbipbKOBT., OMbiBaeMbixt 

 jiHM<i>ofi, npaxeKaiomeH asx. saAaaxX) KoaeqHocxea. H3t> BbiraecKasaaaaro cJiiAyexi, axo <t>acaiii 

 He M'femaioxx. npRXony jiHM<i>bi kt. nysbipbKaiwb. 



YKaaaaabia <i>acn,iH bo Bpewa Aiacxojibi pacxarHBaioxx. nysbrpbKH n xaKHMX. oSpasoM'b 

 aaKaaHBaioxx. JiaM<i>y bt> nojiocxb cepAua. CacxoJibi me, roBopaxx, FepMaax., npoacxoAaxT> oxxoro, 

 axo cepAua, OKpya^eaHbia ne HenpepbiBHbiiw'b, ao cftxeoSpasao pacnpocxpaaajomaMca cjioewT) 

 nonepenao noJiocaxbixx. Mbiran,x>, moryxt yKopaaaBaxbca bt, aanpaBJieaia bojiokobt>, x. e. bx> 

 KaatAOMx> aanpaBjeain, h xaKHMx oSpasoMij Moryxb oKasbiBaxb AaBAenie aa coAepatHMoe. 



IlepenHifl jiHM<i>aTHHeeKlfl eepAua. 



Kb ooHcaaiio nepeAaHXT> cepAen,^ Ranvi er a apaCaBJiK) c^Ayiomee: nepeAaaa qacxb 

 jiaM<i>axHqecKaro cepAHa npHKp-fenjieaa kt> nonepeaaoiviy oxpocxKy 3-ro nosaoaKa: fiojibraaa 

 3aAaaa ^acxb JiemHXTi BT> npoMeaiyxK'fe Mea^Ay nonepeaabiMH oxpocxKaiMH 3-ro a 4-ro no3BoaKOB'b 

 a ofiparneaa cbocw Bcaxpajibaoio aoBopxuocxbio kx. Sproinaoa aojiocxH. 



