MITOCHONDRIA IN TISSUE CULTURES 



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Fig. 7 Changes in shape and anastomoses of a few mitochondria during a 

 period of 25 minutes in a living mesenchyme cell. The changes were so rapid 

 that it was not always possible to draw each mitochondrium; they can be fol- 

 lowed by the lettering; 24-hour old culture from a 6-day chick embryo. 



The mitochondria are frequently arranged in the form of a 

 network (fig. 5 f , g) which may involve many of the mitochondria 

 or only a few of them. A study of the fixed preparations and 

 especially a study of the hving cells shows conclusively that 

 Mislavsky ('11) is correct in his contention that the mitochondria 

 do fuse and branch to form networks. We have observed all 



