Leaf

Leaf: definition
Parts of leaf: petiole,veins,midrib,lamina
Venation
Types of venation: reticulate venation,parallel venation
Difference between reticulate and parallel venation
Examples of reticulate and parallel venation

image credit:
green leafs png



https://unsplash.com/photos/hX_hf2lPpUU

https://www.pexels.com/photo/close-up-view-of-green-leaf-and-leaf-veins-2563452/

http://pngimg.com/img/nature/green_leaves

References:
www.google.com
www.wikipedia.com

1. Leaf Parts and types of venation

2. Leaf Lea Leaf Leaves are typically green, flattened and blade-like structures attached to the stem. These are the sites of photosynthesis.

3. Parts of leaf Petiole - It is the stalk that attaches the leaf to the stem.

4. Parts of leaf Veins - Veins are the vascular tissue of leaves. - They help in transport of food and water.

5. Parts of leaf Midrib - The thick vein in the middle of leaf is called midrib. - It provides mechanical support to the leaf.

6. Parts of leaf Lamina - The flat green part of leaf is called lamina.

7. Venation The arrangement of veins in leaves is called venation.

8. Types of venation Reticulate venation - Veins are arranged in form of a network. - It is found in dicots. - Example: Mango, China rose, Holy Basil, Guava, Coriander etc. Parallel venation - Veins are arranged parallel to each other. - It is found in monocots. Example: Maize, Banana, Bamboo, Wheat, Barley etc.

9. Types of venation Reticulate venation Parallel venation

10. How to draw a leaf ? Take a white sheet of paper. Take the leaf you want to draw. Put the leaf on a plane surface. Put the paper above the leaf. Take a pencil, hold it sideways and rub it over the paper above the leaf.