REGENERATION OF LOST ORGANS. 



121 



cije" 



/fll.-n 



..-bck. 



MsJ^ 



Red 



Blood 



Cells. 



This may be seen in the series of fignres 82, 83, 85. At first the cupola 

 and the cavity beneath are large (Figs. 82, 83), but as the tissues that fill 

 the cavity decay and disappear they diminish more and more (Figs. 85, 86), 

 shrinking gradually towards the base of the joint. 



The tissue of the matrix is only atrophied in part ; really, it is in those 

 parts which converge above the cavity of the joint at the summit of the 

 cupola, that is to say, where the amputation has produced a rent, that one 

 observes the regeneration of the fatty tissue. The deep regular cells seen at 

 the junction (Mtx) entirely disappear, and also afterward the part contiguous 

 to the matrix. 



The red blood cells, after part of them have been regenerated and given 

 birth to the cicatrix, dis- 

 pose themselves in different ^ "^^ "• 

 parts of the joint. They 

 glide between the fibres of 

 muscles and into the clefts 

 which are formed by their 

 gradual bending. 

 The orifice form- 

 ed after the oper- 

 ation at the sum- 

 mit of the joint between the 

 fragments of the matrix 

 (Fig. 84, 0), in spite of the 

 gradual approximation of 

 the extremities of the ma- 

 trix (Figs. 85, 86, 0), re- 

 mains open. In the degree 

 that the summit of the 

 cupola sinks the orifice 

 becomes narrower, which, 

 however, does not hinder 

 the blood cells from pen- 

 etrating thereby from the 

 lower part of the cavity of 

 the joint (Figs. 85, 86, A) 

 into the upper part situ- 

 ated above the cupola (Figs. 

 85, 86, B), to contribute to the work of nourishing the new limb. It is 

 only when the new organ (Fig. 86) is completely formed that those disap- 

 pear. At that epoch the extremities of the old matrix, then sunken 

 almost to the base of the stump, are joined, and the orifice between the 

 cavities below and above the cupola is closed. Shortly thereafter the 

 process of the disappearance of the old tissues ends. 



Fk). 83. A transverse section of the stump of a foot eighteen days after 

 amputation ; Mt.r, place in the matrix where the regeneration of 

 grease is seen; Ms, muscles; gig, globules of grease ; p.g, portions 

 of grease ; pt, 1, part of the new formed foot next the base ; pt. 3, 

 extremity of the same ; pt. 2, part between the above two ; Ms.n, 

 mu.scles of the new formation; ct.n, cuticle of same; chg.n, chi- 

 tinous layer of same; cam, free nuclei of red blood ceUs ; c.sa, 

 amoeboid blood cells ; cj, color cells. 



