BIOLOGY - Cells - Diffusion and Osmosis

This video tutorial explores the movement of substances in cells through diffusion, osmosis, and active transport. It explains how diffusion allows particles to move from high to low concentration, using examples like gas exchange in lungs and nutrient absorption in intestines. Osmosis, the movement of water across membranes, is discussed with its effects on plant and animal cells. The video concludes with a preview of active transport, to be covered in the next part.

Describe the role of specialized exchange surfaces in organisms.

What is active transport and why is it important for cells?