Selective Membrane Filtration Diagram - How Semi-Permeable Barriers Work #198339 (License: Personal Use)

This hand-drawn diagram illustrates the principle of size-selective filtration using a porous brown membrane with three circular pores; blue droplets represent small molecules diffusing through, while red aggregates symbolize larger particles that are excluded. The artistic, minimal style emphasizes conceptual clarity over technical precision, making it ideal for introductory biology or chemistry contexts. Blue molecules appear to emerge from one pore, suggesting active transport or diffusion dynamics.

Used in educational web pages explaining osmosis, dialysis, or filtration processes; matches user intent for visual aids in STEM learning, particularly for students or teachers seeking intuitive diagrams of membrane selectivity.