Hey Ousaima,
that's exactly what I thought of. We need to see how the "plus/minus theory" plays out in practice, and we have descriptions in the wiki how it does for each tissue. So you've got the overview of typical reactions in the compass, and you've got the organ graphics and the detailed descriptions in the wiki and in the book. There are different kinds of symptoms and diagnoses for the tissues in each of the named organs, and we want to get to know how they work, before we get into the interactions and overlaps we meet in practice.

Example to fill in: 
When we look at the lungs, we see in the graphic (and in the tissue lists) that there are both brain stem- and cortex-related parts present. In the endodermal part (the parenchyma), we expect the stress reaction to be a "plus" which means that the function change may be ... and the tissue change may be... In the repair phase, this will be reversed, meaning that...
Whereas in the ectodermal parts, especially the bronchial mucosa, the stress reaction would be a "minus", which can play out as... etc

If you find it difficult to do, please tell me where you get stuck so I know what to address!