Category: I

Within a bundle of nerve or muscle fibers.  

Within a red blood cell.  

Within the tissue lining internal and external body surfaces.  

Within the growth center of bone.  

Within the upper layer of skin.  

Within or beneath the outer coat of brain or spinal cord. Inside the dura mater. Inside the dura mater, which is the outermost of the three protective layers surrounding the brain and spinal cord.  

Within the duct of a gland.  

Within the skin.  

Within a fluid-containing sac.  

Inner part of the muscle running from front of thigh bone to kneecap.