Write a 1200-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.  Use at least 3 to 5 different references in your paper.