VARIOUS KINDS OF CELLS: TISSUES 29 



character from these. They have the form of little lumps of 

 protoplasm from which finger-like or hair-like outgrowths 

 radiate in all directions, and these outgrowths seem to be of 

 the same nature as the outflows of cytoplasm by which simple 

 animals like Amoeba progress (see p. 15). But in many 

 cases these cells appear to become stationary and to join 

 each other by the tips of their outgrowths so as to form a 



FiG. 7. Diagrammatic representation of the formation of 

 connective tissue. There is a network of cells joined by 

 processes the cytoplasm of which is dotted. Connective 

 tissue fibres are indicated by heavy lines ; n, nuclei of 

 the cells. 



network. Along the sides of these connected outgrowths there 

 are deposited tough fibres, and in this way a network of fibres 

 is produced (Fig. 7). Now such a network of fibres is the 

 fundamental basis of the construction of our own bones, tendons, 

 and sinews. In our blood we have cells like those just de- 

 scribed, viz. the celebrated white corpuscles of which so much 

 has been written in late years, but the "skeletal substance'' 

 in which they move is the fluid of the blood. Nevertheless 

 even in this fluid there lies latent the power of forming fibres 



