WHERE FOOD COMES FROM 



123 



Different forms 

 Erect 



Simple ; branched (various 

 types of branching) 

 Shortened (''stemless plants") 

 Structure 



Creeping 

 Chmbing 

 Underground 

 Rhizome ; tuber ; bulb 



Growing areas 



Growing points (buds) 



Terminal ; lateral (at nodes) 

 Cambium layers (in internodes) 

 Functions 



Communicating between leaves and roots 

 Raising leaves 



(Raising flowers and fruits) 

 Propagation 

 Storage of reserve food 

 4. Circulation of sap 

 Ascending currents 

 Composition 

 Water 



Dissolved salts 

 Channels 



Drive 



(Osmosis in roots) 

 (Capillarity through vessels) 

 (Transpiration from leaves) 



Root hairs through cortex of root (by osmosis) 

 Xylem vessels of root, stem, leaf 

 Leaf vessels to pulp cells (by osmosis) 

 Descending currents 



Composition Drive 



Dissolved food material (Probably osmosis 



from leaves and gravity) 



Channels 



Leaf cells into phloem vessels 



Phloem vessels to growing regions of stem (cambium and 



buds) and of root (cambium and growing points) 

 Phloem vessels to flowers (fruit, seed) 

 Phloem vessels to accumulation tissues of stem and root 



