Arkansas Esthetician Practice Exam

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What acts as a barrier to infection from one part of the body to another?

Heart
Blood vessels
Lymph nodes
Kidneys

The correct answer is: Lymph nodes

The lymph nodes are part of the body's immune system and act as barriers to infection by filtering out harmful substances and storing immune cells. The heart, blood vessels, and kidneys do not play a role in preventing infection and are not located in areas that would create a barrier. While the heart and blood vessels are essential for circulation, they do not specifically protect against infection. The kidneys primarily filter and remove waste from the blood, but they do not play a direct role in preventing the spread of infection between different parts of the body. Overall, the lymph nodes play a unique and important role in protecting the body from infections.