<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Explain the function of the respiratory system in the human body. Context: The respiratory system takes in oxygen and expels carbon dioxide through breathing in the human body. Answer: [/INST]It is responsible for taking in oxygen and expelling carbon dioxide through the process of breathing.</s>