A diagram that shows the structure of a blood vessel and a brain barrier. The blood vessel is a cylindrical structure with multiple layers each representing a different type of cell. The top layer is labeled "Lumen" and the bottom layer is labelled "Endothelium". There are six cells in the image each with a different color - pink blue green and purple. The cells are arranged in a vertical line with the pink cells on the left side and the blue cells in a horizontal line on the right side. The pink cells are connected to the purple cells by a series of arrows indicating the flow of blood from one cell to another. The blue cells represent the brain cells while the green and purple cells represent receptors. The arrows indicate the direction of the blood flow through the cells with one cell at the top and the other at the bottom. The diagram also includes a label that reads "Blood-brain barrier" which suggests that the image is related to the concept of blood-brain barriers.

• Illustration

• Outreach and Education