Discovering Diffusion: How Substances Move in Biology
Discovering Diffusion in Biology
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Discovering Diffusion in Biology
What do you already know about diffusion in living things?
Learning Objective & Key Terms
At the end of the lesson you will be able to: • Define diffusion • Explain how diffusion works in living things • Link diffusion to real-life examples in the UAE Key Terms: • Diffusion • Concentration • Cell membrane • Molecule • Equilibrium
What is Diffusion?
Diffusion is the movement of particles from an area of high concentration to an area of low concentration. This happens without using energy. It's important for life!
Diffusion in Cells
Example: Oxygen Moving into Blood
When you breathe in, oxygen diffuses from the lungs into the blood. This process is essential for life.
Why is Diffusion Important?
Diffusion helps cells get the nutrients and oxygen they need. Waste products also leave cells by diffusion.
Diffusion in the UAE
Diffusion and Camel Adaptation
Camels in the UAE have special adaptations. Their cells use diffusion to get rid of extra salt and stay hydrated in the hot desert.
Diffusion in Plants
Plants use diffusion to take in carbon dioxide from the air and release oxygen. This happens in the leaves.
Quick Check: Can You Spot Diffusion?
Look around: Do you see examples of diffusion around you? Think about perfumes, food smells, and air fresheners.
Summary: Key Points
• Diffusion is the spreading of particles from high to low concentration. • It's important for cells in all living things. • Real-life examples can be found in the UAE's environment and animals.
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
