Across
- 5. Lipid-rich sheath that insulates axons and speeds up electrical conduction.
- 8. Connective tissue surrounding individual axons in the peripheral nervous system.
- 10. Embryonic cell population that migrates to form much of the PNS and other structures.
- 11. Carbohydrate storage granules found in metabolically active cells; appear electron-dense under EM.
- 13. CNS immune cells derived from monocytes; perform phagocytosis and respond to injury.
- 14. Specialized ectodermal thickening that gives rise to the neural tube.
- 16. Growth factor family involved in neuron survival, axon growth, and synaptic plasticity.
- 17. Outer dense connective tissue layer that encloses an entire peripheral nerve.
- 18. CNS glial cells that form myelin by wrapping around multiple axons.
- 20. Connective tissue layer that surrounds a nerve fascicle and contributes to the blood-nerve barrier.
Down
- 1. PNS glial cells that myelinate or support peripheral axons, one segment per cell.
- 2. Small glial cells in PNS ganglia that surround and regulate the environment of neuronal cell bodies.
- 3. Iron-storing pigment seen in tissues after hemorrhage or in conditions of iron overload.
- 4. Ciliated epithelial-like glial cells lining the brain ventricles and spinal canal; involved in CSF movement.
- 6. Small gaps between adjacent myelin segments that enable saltatory conduction.
- 7. Rare adult progenitor cells in CNS niches that can generate neurons and glia.
- 9. Embryonic structure formed from the neural plate; gives rise to the brain and spinal cord.
- 12. Clumps of rough endoplasmic reticulum found in neuronal cell bodies; stain basophilic.
- 15. Star-shaped CNS glia involved in ion balance, neurotransmitter recycling, and the blood-brain barrier.
- 19. Brown pigment found in aging neurons and cardiac muscle; a lysosomal digestion by-product.