FUNCTIONS OF ANIMAL ORGANISMS 



487 



Dissimilation 

 Tissues 



Assimiloifion 



/ 



Digesfion 



I Animal 



Food Organism 



Eli mi nation 

 Expiration 



Bacterial 

 Decay 



Proteins, Fats, 



Carbohydrates in 



Plants 



\ 

 Photosynthesis 



in Plants 



-CO2 

 Air Sr Water 



Fig. 355. — Diagrams to illustrate the carbon cycle in organisms. The steps above 

 the line of dashes occur in the animal organism, those below outside of it and in part in 

 plants. 



Dissimilation 



Tissues 



Assimilation 



/ 



Digestion 



\ 



Food 



Proteins 



Animal 

 Organism 



Nitrogenous 

 WastesWrea) 



Deatti 



/ 



y 



\ 



Photosynthesis 

 in Plants 

 \ 

 Nitrates 



N of Air, 



Nitrogen 



Fixing 



Bacteria 



i!r J' 



Elimination 



Bacterial Action in 

 Soil &■ Water ^ 



"K Bacterial Decay 



Denitrifying / / 



Bacteria Ammonia 



I / 



Nitrite Bacteria 



/ 



Nitrites 



Fig. 356. — Diagram to illustrate the nitrogen cycle related to organisms and their activities. 

 The steps above the line of dashes take place in animal organisms. 



