question: Lymph vessels make up a circulatory system that is similar to the blood vessels of what system?
distractor3: gastrointestinal
distractor1: nervous
distractor2: cardiac
correct_answer: cardiovascular
support: Lymph vessels make up a circulatory system that is similar to the blood vessels of the cardiovascular system. However, lymph vessels circulate lymph instead of blood, and the heart does not pump lymph through the vessels.