Parts of a Leaf Objectives  Identify the parts of a leaf Leaves   the food factory of the plant produce the food used by the plant or stored for later use Shape and size of leaves   vary among plants used for identification of plants External leaf structure   petiole - leaf stalk leaf blade (leaf)  has veins  forms structural framework of the leaf Midrib  Midrib large center vein from which all other leaf veins extend Margins   edges of leaves assists in plant identification Review  What are the basic parts of a leaf? scar 1---- 'Jj#------------- А. 1node· -----� te·rminal----�-,ч,� lbt11d scale sca1rs В,.