Describe the various parts of a leaf.

(N/A) typical leaf consists of three main parts:
$1$. Leaf base (Hypopodium): The part by which the leaf is attached to the stem. It may bear two lateral small leaf-like structures called stipules.
$2$. Petiole (Mesopodium): The stalk of the leaf that helps hold the blade to light. Long,thin,flexible petioles allow leaf blades to flutter in wind,thereby cooling the leaf and bringing fresh air to leaf surface.
$3$. Lamina (Epipodium): The green,expanded part of the leaf with veins and veinlets. The middle prominent vein is known as the midrib. Veins provide rigidity to the leaf blade and act as channels of transport for water,minerals,and food materials.