Problems with importing from Blender (or maybe I did something wrong in Blender)

Hi folks!

I’ve made a character for my game in Blender and added some animations to it.
I export the file in FBX format.
After importing the mesh to Unity it is missing a lot of surfaceses and has big holes in it. What have I done wrong?
Please help a begginer out!

I think I may know. When creating the Object make sure the Normals are set to outside. If you are not sure how go into edit mode and select all vertices and then hit Control N and it will set them to all point outwards. If that is not it you may want to say which version of Blender you are using. If you are comfortable you can send me in a private message the .blend file and I can see if it does it for me as well and I can see what may be causing it.

That did the trick!! Everything works fine now.

Thanks a lot mate!