Across
- 2. a a lymphatic organ located in the upper chest
- 4. a that carry information or signals away.
- 8. a blood cells through capillary walls into the tissues.
- 9. b cells a that develop in response to an initial encounter with an antigen.
Down
- 1. nodules immune surveillance.
- 3. a tissue located high in the throat.
- 5. a swelling caused by the accumulation of fluid in the body's tissues.
- 6. a posterior to the stomach and below the diaphragm
- 7. t cells a previously encountered antigens.