210 



LECTURE X. 



All of the tissues are formed from this. The only proteins contained in 

 milk are lactoalbumin, lactoglobulin, and casein. From these, and also in 

 the case of animals in which the albumin content of the milk is less prom- 

 inent than is true of human milk, all sorts of different proteins with 

 their varying functions must be formed. We need only refer to the albu- 

 minous substances of the blood, to serum-globulin, serum-albumin, hemo- 

 globin, then to the numerous albuminous constituents of the tissues, and 

 all of the other proteins. A glance at the following table will give a good 

 conception of the great changes which one protein must undergo to produce 

 all the others. 



