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Identify the major structures and function of the lymphatic system. Which of the following is a function of the lymphatic system?  a.) Circulating nutrients to various organs  b.) Sending signals from the brain to the extremities  c.) Returning excess fluid to the circulatory system  d.) Pumping blood through the body 2 — Pathogens Determine how the human body protects itself from pathogens. Which of the following statements about innate immunity is true?  a.) Innate immunity i...