214 BIOLOGY AND HUMAN LIFE 



2. Unity of life in a plant 



Relation of various organs to the plant's life 



Root processes 



Stem processes 



Leaf processes 



Flower and fruit processes 



Seed processes 

 Processes going on in all the organs of the plant 



Assimilation 



Respiration 



Excretion 



Cell division (reproduction) 



Response to change 



3. Unity of Hfe in an animal 



Relation of various organs to the life of the whole 



Food-getting organs 



Digestive organs 



Breathing organs 



Locomotive organs 



Excretory organs 



Circulatory organs 



Sensory organs 



Reproductive organs 

 Processes going on in all the organs of the animal 



Assimilation 



Respiration 



Excretion 



Cell division (reproduction) 



Response to change 



4. How unity of life is maintained in higher animals 



The blood as a unifying system 

 The internal secretions 

 The nervous system 



QUESTIONS 



1. Show how different kinds of organs do the work of food-getting. 



2. What is there in the butterfly that does the work of our teeth ? 



3. What is there in the human body that corresponds to the spiracles 

 of an insect ? In what sense do these correspond ? 



