Write a 12,050- to 12,400-word paper that includes the following:
- Summarize the biology of B lymphocytes from origin to surface molecules.
- Summarize the biology of T lymphocytes from origin to surface molecules.
- Analyze the reactions of T and B lymphocytes with each other as well as with other cell types.
- Explain the importance of cytokines and their receptors in immune system development and responses.
Format your paper consistent with APA guidelines.