DEVELOPMENT OF THE HUMAN HEART 



259 



In a measure this was confirmed by Kon 9 who observed the devel- 

 opment of the reticulum in the liver of a foetus in the middle of 

 pregnancy. Mollier 10 in his beautiful study on the development 

 of the blood shows conclusively the connection between the endo- 



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Fig. 6 Section of the anterior endocardial cushion in the atrium of an embryo 

 3.9 mm. long (No. 463). X 360. 



thelial cells of the liver and the surrounding reticulum. This 

 he follows back to a human embryo 10 mm. long and in subsequent 

 stages the connection of the endothelial with the reticulum is 



9 Kon, Die Gitterfasergeriist der Leber, etc. Archiv. fur Entwickl.-Mechanik, 

 Bd. 25, 1908. 



10 Mollier, Die Blutbildung in der embryonalen Leber des Menschen. Archiv 

 fur mik. Anat., Bd. 74, 1909. 



