Tree increases each year m 

 height and spread of branches 

 by adding on new growth 

 twigs 



Air supplfes carbon., 

 the pr,ncVpai:foodof 

 the tree.Taken inon 

 under surface o-P 

 leaves 



Light ana heat 

 necessary for 

 Chemical change* 



Leaves prepare 

 the food obtamec 

 from airand scyl 



Heartwood (inactive) 

 gives strength 



Sapwood carries sa 

 from root to leaves 



The breathing pores of 

 the entire tree ,-or> leaves 

 twigs, branches, trunk and 

 roots take m oxygen 

 Flooding, poisonous gases 

 or smoke may ki I la tree 



Cambium ( 

 builds the cells 



inner bark carries 

 prepared food from 

 leaves to cambium laye 



Outer bar-K protects 

 tree from injuries 



t tips or root hair taKe 



quantity Of minerals t 

 solution. 



US.DEPT OF AGRICULTURE 



FOREST SERVICE 



HOW THE TREE GROWS 



The buOS 'OO* tips ana cambium layer- a re the growing parts of : the tree' 

 Vyater conTa"-,ng a srnal quanTiTy of minerals in solution is absorbed by the 

 Hpots carried up tn rough Trie sapwood to the leaves and there combTnedwith 

 (Carbon from The airto make food Thia -food is carried bythe ian<C. barl< "* a '* 

 growing parts of the tree even cown to the root-Tips 



