I am very new to blender. I imported a model from xnalara as an obj. file so that I could use it in blender. After rigging it, I noticed that the hair and teeth do not follow the head bone when I pose it. The only vertex groups I have are for my bones. I do not see the hair and teeth listed in the collection as separate meshes. The entire body, including hair and teeth, are showing as one mesh, yet when I pose the head, the hair and teeth remain fixed in place. How do I make the hair and teeth move with the head?
I also noticed that this model's hair and eyelashes look like pictures of hair on a sheet of black paper. Is there a way to fix that?
Would greatly appreciate any help or links to a hair tutorial. Thank you!

