Merging mesh parts that use the same texture and shader I have created a model and imported it into Blender.



All parts of the mesh use one and the same texture image.

However, when load my blend file in Unity, each and every mesh part receives an individual shader / material slot:



My problem is 

1) that I have to re-assign the material in Unity (well, I guess, I will sooner or later find out why Unity does not use the correct material right away)

2) that I would like to merge some parts into a single part (for example, "Face", "Legs", "Arms", etc. should be a single object called "Body" since they will use the same shader)

Can somebody tell me how I can do that? 

Thank you!
If you select one part in Blender then double tap the 'a' key, it will select everything. 

If you press 'Ctrl+j' it will merge all the parts. 

Unity should now only see one mesh, material and texture.