24 



ANIMAL PHYSIOLOGY. 



from their attachments and teased out they curl up afc the 

 ends, that they refract light very strongly, and that they are 

 unaltered by acetic acid. Elastic tissue is not easily altered 



Fig. 6. ELASTIC TISSUE. A, From ligeamentum nuchse of sheep. 

 B, From pleural surface of lung. 



by even prolonged boiling, and yields no gelatin. In many 

 places, as, for example, underneath the pleura, isolated elastic 

 fibres are exceedingly abundant, of great length, curling 

 naturally, and crossing one another in all directions. 

 A /^ 3 



Fig. 7. ADIPOSE TISSUE. A, The usual appearance of fat-cells ; 

 a, shows a nucleus on the side of a fat-cell; b, cell 'filled partly 

 with water, partly with oil. B, Scheme of the mode of accumu- 

 lation of oil in young fat-cells. 



12. Adipose Tissue is the term technically used for the 

 fat of the body, because fat in its proper acceptation means a 

 solid oil, such as tallow. Adipose tissue consists of a number 



