explain photosynthesis

 

Green plants make their own food
photosynthesis in green plants
what is light reactions and dark reactions
The internal structure of a leaf
What conditions are needed for photosynthesis
The chloroplast
CO2 for photosynthesis
Sunlight for photosynthesis
Water and photosynthesis
The root structure

OTHER LESSONS
Asexual Reproduction
Charact' of Living Things
Ecosystems
Elements, mixtures and compounds
Electricity

Energy
Forces
Genetics

Nutrients in Food
Rock Cycle
Simple Machines
Soils
States of Matter
Symbiosis
The Five Senses
Water Cycle
Winds

light and photosynthesis

 

The Structure of the Roots

The water absorbed by the root hair cells passes through the plant in xylem tubes, and eventually reaches the leaves. Energy from the sun is eventually used to convert water into hydrogen and oxygen.

Structure of the root hairs  
structure of the root hairs

This hydrogen is combined with the carbon dioxide in order to produce the food (glucose) for the plant, whereas the oxygen, which is a by-product of the entire process, is let out through the stomata.

If a plant does not absorb enough water, it will wilt or go floppy. Without water, it may also not photosynthesise quickly enough, and it may die.

Roots
Roots systems and root hairs are adapted to play a special role for the plant. The root network spreads out to absorb water (and mineral salts) from a large amount of soil. It is also adapted to hold the plant firmly and provide support (anchor) to the plant in the soil.


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green plants make their own food



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