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The first thing I thought about the image was a three. It reminded me how a tree grows and expand. It was not until I read the explanation that I understood that they were lung cell (which I was not that far from the reality as a tree can be understood as the lungs of the world). The title was not that obvious to me, but I think is a god starting point to bring to surface the importance of Toll-like receptors in the human body.An important theme to highlight with this image is how we tend to focus on the medical aspect when we talk about asthma or other respiratory conditions.