Chapter 20 – The Lymphatic System and Lymphoid Organs and Tissues

12345678910111213141516171819
Across
  1. 4. The thymus forms as an outgrowth of the lining of the primitive _________.
  2. 5. Lymph flow stagnates in the lymph node since there are fewer ________ lymphatic vessels
  3. 6. Lymphoid tissues strategically located in mucous membranes throughout the body
  4. 10. Once interstitial fluid enters the lymphatic vessels, it is called __________.
  5. 11. The lymphoid organs develop from mesodermal __________ cells.
  6. 13. Prominent in newborns, this organ is where T lymphocytes mature
  7. 14. Form a ring of lymphoid tissue around the entrance to the pharynx
  8. 15. Elaborate networks of drainage vessels that collect the excess protein-containing interstitial fluid and return it to the bloodstream
  9. 18. Infected lymph nodes that are swollen and tender to the touch
  10. 19. Anything that promotes an immune response, such as bacteria, viruses, or cancer cells
Down
  1. 1. Largest lymphoid organ
  2. 2. Paired, largest tonsils located at the end of the oral cavity and the ones most often infected
  3. 3. ___________ phagocytize foreign substances and help activate T cells
  4. 7. Tubular offshoot of the large intestine
  5. 8. Main warriors of the immune system that arise from red bone marrow
  6. 9. Cells that capture antigens and bring them back to the lymph nodes
  7. 10. Special set of lymphatic capillaries that transport absorbed fat from the small intestine to the bloodstream
  8. 12. Tonsil at the base of the tongue
  9. 16. Tonsil also referred to as the adenoids if enlarged, located in posterior wall of the nasopharynx
  10. 17. Lymph enters the lymph nodes via the __________ lymphatic vessels