STEMS

Stems serve to lift a plant’s leaves up towards the sunlight. They are different from roots in that they contain nodes and internodes.
 
 
 
 
 
 
 

Nodes are the point of attachment of the leaves

Internodes are the areas between the points of attachment of the leaves.
 
 

Just like plants have roots modified for specific functions, they also have stems modified for specific functions.There are many examples of modified stems in the grocery store:
 
Celery Stalks
 

Stems that store food for the plant
Asparagus
 
 

A stem with a terminal bud
White Potatoes

Tubers - a type of swollen, solid, underground horizontal stem that is used for storage
On tubers, the eyes are the nodes
Onions

Bulbs - a type of stem that has a thickened, underground, short, vertical stem with storage leaves.

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