THE NUTRITION OF THE HEART 



163 



Funnel (refilling 

 zafr vent) 



Stock solution 

 (to luted blood + 

 a salt solution) 



Metal pan 

 Hot water bath 



pig 39_ One form of apparatus for recording tracings from an excised heart (Langendorff 

 method). The heart is kept warm by a water bath (heart warmer), and the perfusion fluid is 

 also warmed. The driving pressure in this apparatus is supplied by gravity. (From Jackson.) 



