How Do Trees Compartmentalize Against Decay?

The diagram below shows the different cells that make up the biological structure of a tree. These cells have many different functions including compartmentalizing or containing the spread of decay. A trees ability to contain or compartmentalize successfully an infection, is dependent on the type of disease it is infected with. Some types of disease are by there very nature aggressive in there mode of decay, and decay can be extensive.

A tree compartmentalizes itself into 4 barrier cell walls.

Wall 1 – Vertical                                             Vessels

Wall 2 – Inward                                              Annual Rings

Wall 3 – Sideways                                          Rays

Wall 4 – Outwards                                          Cambium