This slide shows a cross-section through the large sciatic nerve. In the cross-section, identify the epineurium (Epi) and the perineurium (Peri) surrounding each of the many fascicles, and the nuclei of fibroblasts of the endoneurium (Endo), the connective tissue between individual axons in a fascicle. In such a routine preparation, the myelin has been dissolved by the organic solvents used in processing.