Bio 122 -- Chapter 21 objectives
  1. What are three functions of the lymphatic system?
  2. Describe how lymph is formed, and how it returns to general circulation.
  3. Describe the characteristics of lymph vessels and capillaries.
  4. What is the purpose for lymph nodes?
  5. Know the structure of a lymph node, and how it functions.
  6. Describe the functions of other lymphatic organs: spleen, thymus gland, tonsils, and peyer's patches.
  7. Discuss problems associated with the lymphatic system, including lymphomas, cancer metastasis, and bubos.