

PHYSIOLOGY 



were not at all involved. In other words we have treated 

 the subject as though the heart and all the vessels were 

 in thf; namo horizontal plane. This can never be exactly 

 the case and it is very far from the condition in man with 

 ':ct. posture. In one sense gravity does not in- 

 fluonco the circulation: there is always as much blood 



Subtract 



50 m* 

 mercury 



H.L 



Km. 5('. -To minxes! lio\v lln- \vei;..lil i.T I In- I .In i.i I columns :i<l<ls lo 



I"' 'I |'i- lift l"'lo\V III.- Iic:il! ML I sIlltlTHClM from Iliose ;llio\r Us 



level. Tin n .in- obtOUrC faotOri \\lm-li Omewhul li'inprr Hn> extreme 

 Ifftfl iiii.n \\ i :inn..t coiielinle 1 1 i.i 1 1 .-i ln,|\ ..I | In li;.| M -,. | |, ;l f srenOUl 



I .......... tli' lle.'lil .ili.l Heck .'lie liMK'll In 'li.\\ Hie :i I 1 1 1, . | i| irn, . Tills 



\\oiiM I >e (me iii M M\ stem of H!MSH tublnR, but In collupnihlo veins suffiolenl 

 tinmt always be maintained to keep the vewols iium ii:in. 



m I here is risini-; in tin- svslrm :MH| \vr li;i\c to do 

 \\ illi I>:I|:IIIC<M| columns. The hc:irl docs no( |>crm:mcnl ly 

 III! :in\ \\ciidil from :i lower lo ;i higher level. \\u\ 

 r.i.'i\ H \ does h;i\ ( M marked influence upon local pressure 

 Ml l'loo<l helou lh<- heai'l presses harder upon the 

 vessels than it \\ould at the heart's own level. All Mood 



