Organ systems are groups of organs that work together to perform specific functions in the body. For example, the digestive system includes organs like the stomach and intestines, which help break down food and absorb nutrients. Each organ in a system has a unique role, but they all collaborate to keep the body healthy and functioning properly. Another important organ system is the circulatory system, which consists of the heart, blood vessels, and blood. This system is responsible for transporting oxygen, nutrients, and waste products throughout the body. By working together, these organ systems ensure that all body functions are coordinated and efficient.