The reticular formation consists of nerve fibers, and there are no nerve cells. 网状结构由神经纤维组成，没有神经细胞。
举一反三
- ______ cells create myelin, which surrounds nerve fibers of the peripheral nervous system.
- In peripheral nerve fibers, sheath cells are () A: Astrocytes B: Oligodendrocytes C: Satellite cells D: Ependymal cells E: Schwann<br/>cells
- In central nerve fibers, the sheath cell is() A: Astrocytes B: Oligodendrocytes C: Satellite cells D: Ependymal cells E: Schwann cells
- In peripheral nerve fibers, the sheath cell is A: Astrocytes B: Oligodendrocytes C: Satellite cells D: Ependymal cells E: Schwann cells
- Lying under the skull, the human brain contains an average of ten billion nerve cells called ______. A: nerve fibers B: nerves C: neurons D: cerebral cortex