Answer:
endoneurium and perineurium respectively
Explanation:
Endoneurium: Is a layer of a very delicate connective tissue around the myelin sheath of each myelinated nerve fiber in the peripheral nervous system. Its composed by cells that are called endoneurial cells.
Perineurium: It's a protective sheath that surrounds each group fascicles, which are axons that target the same anatomical location where one can find the Endoneurium.
