nt_03. Oligodendroglia (satellite cells, Schwann cells)
(Heidenhain's azan)
1. Identify groups of neurons and longitudinally cut myelinated nerve fibers, take a closer look at the structure of oligodendrocytes:
- the cell body of each neuron is surrounded by a layer of flattened capsular cells satellite cells;
- in myelinated axons, Schwann cells form the myelin sheath;
- the gaps between adjacent Schwann cells are called the nodes of Ranvier (myelin sheath gap).
2. Draw and point out:
- 1 - the perikaryon,
- 2 - satellite cells,
- 3 - the myelin sheath of the nerve fiber,
- 4 - the nucleus of the Schwann cell,
- 5 - the node of Ranvier.
3. Define and write significant features of the specimen.