What is a group of organs that work together in performing vital body functions?

• A. Organs
• B. Organ systems
• C. Tissues
• D. Cells

Answer: (B)

Think about how the body coordinates life-sustaining activities. When several organs work together to carry out a broad function, that group is called an organ system. Each organ contributes a specific task, but only together can the body perform essential processes like pumping blood, exchanging gases, or digesting food. This organization fits into the broader sequence where cells form tissues, tissues form organs, and organs come together as organ systems to keep the body functioning and in balance. The other terms refer to smaller building blocks: organs are individual structures like the heart or stomach; tissues are groups of similar cells; cells are the basic units of life.