THE NUTRITION OF THE HEART 



163 



Funnel (refilling 

 & air vent) 



Stock solution 

 (Diluted blood + 

 a salt solution) 



Metal pan 

 Hot water bath 



"fiver 

 Tube soldered 

 between palls 



Fig. 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.) 



