HYALINE, CARTILAGE: 5 
mucin, gelatin, and various salts in small proportions. 
Chondrin is soluble in hot water, and insoluble in 
alcohol, chloroform, or ether. 
Mecordme to the character of the matrx ‘or 
ground substance all cartilage may be grouped under 
three varieties: 1. Hyaline cartilage, 2. Elastic 
cartilage, and 3. White fibro-cartilage. 
1. Hyaline cartilage forms the costal cartilages 
of the sternal portion of the ribs, the skeleton of 
the embryo, &c. 
It takes its name from the hyaline transparent 
nature of its ground substance. 
The cells, which are irregularly scattered through- 
out the ground substance, are oval or spherical nucle- 
ated masses of protoplasm, enclosed in a transparent 
membrane or capsule, which forms what is known as 
the cartilage lacunze. This membrane is not usually 
distinguishable from the ground substance, except 
when treated with special reagents. In each lacuna 
there is a single cell; but two, four, or more may be 
present. In certain forms of hyaline cartilage, fine 
channels connect the lacunze with one another, and 
enter into connection with the lymphatics of the 
perichondrium. “ 
The protoplasm of the cartilage cell, sometimes 
filled with globules of fat. 
It has been shown by Tillmans, Babor, and 
others that, under special treatment, hyaline cartilage 
can be broken up into fibres. 
