Epithelhülle
Epithelhülle, also known as an epithelial sheath, is a term used in biology and medicine to describe a layer of epithelial cells that surrounds or encloses another structure. This can refer to various anatomical contexts. In the field of neuroscience, it commonly describes the epithelial sheath that surrounds nerve fibers, particularly the myelin sheath in peripheral nerves. This sheath is derived from Schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system, which are specialized glial cells that form the myelin.
In other contexts, epithelhülle can refer to the epithelial lining of glands or ducts. For example, the