Information for Schools and Colleges


Identification of stomatal physiology - a free teacher's resource

Return to Teachers Toolkit Search


Each person on this earth is individual and different. Did you know that plants are too? Each plant species is unique and each individual plant within that species is unique too, just like you and me!

There are many characteristics that are very important, and are found in all plants. All plant leaves contain a pore called stomata. These act like a ‘mouth’ and regulate a plants gas exchange and water movement.

The size, shape, abundance and location of the stomata will vary depending on the plant species. Many plants have stomata on the upper surface and others have stomata on the underside.

This fun activity will help students gain an understanding of:

  • Stomatal variation between plant species and within plant species
  • Stomatal structure
  • Importance of stomata in controlling a plants gas exchange
  • Water lost through evaporation and its impact on the plant
  • Plant adaptation within different habitats

The activity aims to:

  • Engage students in plant biology and the importance of studying plants
  • Encourage enthusiasm in participating in practical and observing science come to life
  • Help understanding of key concepts in plant biology, diversity and adaptation
  • Provide practice in microscope use
Relevant subjects Type of activity Suitable audiences
  • Biology
  • Resources
  • Y 7
  • Y 8
  • Y 9
  • Y 10
  • Y 11
  • KS 3
  • KS 4