Question

what are functions of veins and midrib in a leaf

Answer 1

Functions of vein and midrib are pretty much same.
Midrib is the thickest vein in the leaf lamina. Lateral veins arises from midrib.

Functions:
1. Provide mechanical support to leaf.
2. Helps in transport of water and minerals to mesophyll cells.
3. Helps in transport of food synthesised by mesophyll cells to stem.

Answer 2

Explanation:

A midrib is commonly find at the back part of a leaf which is become a storage of the stomata. The blade of a leaf is the expanded, thin structure on either side of the midrib. Midrib 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.

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