Which option best describes the relationship between organs and organ systems?

• A. An organ system is a group of tissues
• B. A tissue is a group of organs
• C. A group of organs working together to perform a function
• D. An organ is a living thing

Answer: (C)

Think about how the body is organized: tissues form organs, and several organs join to work as an organ system. An organ is a structure made of different tissues that carries out a specific job, like the stomach helping to digest food. An organ system is a set of multiple organs that cooperate to perform a larger function, such as digestion or circulation. So the relationship is that an organ system is a group of organs working together to perform a function. This shows how different organs coordinate to accomplish complex tasks in the body. The other descriptions don’t fit because a group of tissues isn’t an organ system, a tissue isn’t a group of organs, and an organ isn’t a living thing on its own.