Final answer:
The reproductive system is the exception when it comes to body systems that are geared towards maintaining the life of an individual. Its main function is to ensure species continuation through reproduction.
Step-by-step explanation:
The question you are asking is about which body system is the exception when it comes to maintaining life functions. Nearly all body structures and functions work in ways that maintain life; however, this is with the exception of the reproductive system. Unlike the nervous system, muscular and skeletal systems, circulatory system, digestive system, and immune system, the reproductive system's primary function is not to maintain the individual organism's life, but rather to produce new individuals, ensuring the continuation of the species.