Human body systems are made up of organs that work together to perform specific functions. The circulatory system and the respiratory system have one organ in common. Which organ is common to both systems?

A. arteries

B. large intestines

C. stomach

D. heart

Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?

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