What is the MIDRIB of the leaf?

a midrib is the central part of a leaf,,,... and it can help 2 carry the leaf tightly...

a midrib is commonly find at the back part of a leaf which is become a storage of the stomata....

It helps to keep the leaf in an upright position and to keep the leaf strong with protection from the wind

It's the primary vein which consists of vascular bundles-- food nutrients and water conduction. It also supports the leaf to be exposed to the sunlight.