84 MANUAL OF HISTOLOGY. 



The cartilage capsules do not usually appear to have any 

 connection with one another when examined in an indifferent 

 fluid, though in the episternal cartilage of the frog, immedi- 

 ately beneath the perichondrium, a connection may occasion- 

 ally be seen. 



Division of the cartilage corpuscle. One of the prominent 

 features seen in cartilage is the division of the cartilage cor- 

 . puscle. First we notice the 'splitting of the nucleus ; then of 

 the corpuscle itself. When such a division has taken place 

 the corpuscles are called daughter-cells (Fig. 33). As a next 

 step each daughter-cell may divide and again subdivide, and 



FIG. 33. Fresh cartilage from the triton. (Rollett.) 



thus we have developed in one capsule four or eight cor- 

 puscles. Sometimes it will be observed in the same specimen 

 that with each division of a corpuscle, hyaline matter from 

 without the capsule pushes in, and so from the original capsule 

 two are now formed. 



Calcification of hyaline cartilage. Hyaline cartilage in 

 old age is infiltrated by a deposit of the salts of lime, which, 

 when seen under the microscope, have a granular appearance. 

 The deposit occurs first round about the cartilage capsule 

 (Ranvier). 



Nerves and blood-vessels are not supplied to hyaline car- 

 tilage proper, though blood-vessels which belong to adjacent 

 tissues sometimes dip into it or pass through it. 



Methods of studying hyaline cartilage. An excellent and 

 simple plan is to snip off the tip of the episternal cartilage 



