plant physiology

By: Sade Sturdivant


Plants absorb water through the entire surface - roots, stems and leaves. However, mainly the water is absorbed by roots. The area of young roots where most absorption takes place is the root hair zone. The root hairs are delicate structures which get continuously replaced by new ones at an average rate of 100 millions per day. The root hairs lack cuticle and provide a large surface area


the process by which plants, algae, and some bacteria use sunlight, carbon dioxide and water to make food


the process by which plants release water vapor into the air through stomata


describe the inactive state of a seed or other plant part when conditions are unfavorable to growth

steps for photosynthesis

Photosynthesis Step 1

Chloroplasts in the leaf traps sunlight/ light energy (plants will grow towards the light energy)


Photosynthesis Step 2

Water and minerals absorbed by the roots from the soil, flow up through the stem and enter the leaf


Photosynthesis Step 3

Carbon dioxide enters the leaf


Photosynthesis Step 4

Light energy, water and minerals and carbon dioxide mixed together to make sugar/ food (glucose) for the plant


Photosynthesis Step 5

Sugar (food) leaves the leaf and moves to different parts of the plant


Photosynthesis Step 6

Oxygen leaves the leaf, through the stomata

Cellular respiration

a process that converts the energy stored in food into a from of energy that cells can use