Page 190 - New Medley 3 Semester 1

Structure of a leaf

A leaf has many parts. A leaf Leaf blade

is attached to a stem with a
stalk. Its broad and at part Midrib

is called a leaf blade. e Veins
leaf blade has many thin

and small tubes called veins. Stomata
A thick vein in the middle Stalk

of the leaf blade is called a Knowledge Zone
midrib. Veins help the leaf distribute water and food. The green colour of leaf is due

A leaf has many tiny pores (holes) called stomata to a pigment called chlorophyll.

on its lower surface. Stomata cannot be seen with A pigment gives colour to
the naked eye. something.

Functions of leaves
 Leaves make food for the plant in the presence of sunlight, Sun

using carbon dioxide gas from air and water from soil.
is process of making food is called photosynthesis. Sunlight

So, the leaf is called the kitchen of the plant. During Carbon
photosynthesis, leaves give out oxygen gas into the air. Sugar dioxide

 Stomata on the leaves help the plant breathe by taking in Oxygen

and giving out air. Water

 Leaves of plants like cabbage, spinach, mint, coriander
and mustard are eaten as food. Many animals like cow, Photosynthesis

bu alo, goat, sheep, gira e, etc., also feed on the leaves.

FLOWERS

Flowers are of di erent colours, shapes and sizes. ey make

Flower

bud the plant beautiful. e buds bloom into owers.
Flower

Buds open into flowers
Sunflower Pansy Rose

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