i6 



THE ELEMENTARY TISSUES 



large amount of white fibrous tissue in the matrix. It com- 

 bines the toughness and flexibility of fibrous tissue with the 

 firmness and elasticity of cartilage. It is found chiefly in the 

 intervertebral disks, the symphyses and interarticular disks 

 of certain joints, and lining, bony grooves for tendons. 

 Chemically, cartilage is complex, consisting of a mixture 



FIG. 13. Elastic fibro-cartilage, 



Showing cells in capsules and elastic fibers in matrix. (From Yeo after Cadiat). 



of collagen, chondro-mucoid and albuminoid substances. On 

 boiling, it yields a substance known as chondrin, which on 

 cooling turns to gelatin. 



FIG. 14. 'White fibro-cartilage. (Radasch.} 



(6) Bone. Bone is a dense form of connective tissue con- 

 stituting the skeleton or framework of the body. It serves to 



