110 FORMATION. 



159. Formation. — Moreover, the mode of formation 

 of connective tissue is opposed to the above theoretical 

 views. Connective tissue results in many cases during 

 the growth of higher and more important textures. 

 The intervals between nerves, muscles, and other 

 tissues, and between the constituent parts of these 

 tissues respectively, are occupied by connective tissue. 

 When a tissue or organ is to be developed, its germ 

 always originates from bioplasm occupying the centre 

 of a collection of masses of bioplasm. As its develop- 

 ment proceeds, the .superficial masses of living matter 

 are pushed further outwards ; and, instead of taking 

 part in the formation of the particular tissue or organ 

 in question, their formative power is limited to the 

 production of this indefinite fibrous or connective 

 tissue. 



160. Connective tissue formed during tlie waste and 

 decay of organs. — As organs and tissues decay, much 

 of their structure is removed, but a residuum which 

 remains is known as connective tissue, the masses of 

 bioplasm of which correspond in many cases to those 

 of the original cells or elementary parts of the tissue 

 or organ which has wasted. ^Nerves, muscles, the 

 tissue of the brain and spinal cord, the glandular 

 tissue of the liver, kidney, and other organs, may thus 

 become converted into a texture which is exactly like 

 connective tissue, a form of which may even be pro- 

 duced from white blood and Ijonph corpuscles. In 

 all kinds of connective tissue the relation of tlie 

 bioplasm to the fibrous tissue or formed material is 

 the same. In disease the masses of bioplasm often 

 increase in size and multiply in number, giving rise 

 to new connective tissue, which is added to that 

 which already exists. In this way the condensation 

 and alteration in properties of the original texture 

 may be effected. 



161. Cord-like fibres in fibrous eonnective. — In 

 raany kinds of connective tissue, besides a delicate 



