as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
describe a function of the immune system.
user
the immune system is the body's defense system against infection and disease. it is composed of a network of cells, tissues, and organs that work together to identify and eliminate foreign substances, such as bacteria and viruses, from the body. it also helps to destroy abnormal cells that have the potential to become cancerous.
assistant