Final answer:
A nurse should palpate the neck to assess the posterior cervical lymph nodes during an examination of the lymphatic system.
Step-by-step explanation:
During an examination of the lymphatic system, a nurse should palpate the neck to assess the posterior cervical lymph nodes. The posterior cervical lymph nodes are located on the back of the neck. By gently pressing and feeling the neck area, the nurse can check for any enlarged or tender lymph nodes.