How do animal body system work together?

Animal body systems work together through intricate interactions to maintain homeostasis and support life processes. For example, the respiratory system provides oxygen to the blood, which is then circulated by the cardiovascular system to supply energy to cells throughout the body. Meanwhile, the digestive system breaks down food into nutrients that are absorbed into the bloodstream and transported to cells. These systems communicate and coordinate their functions, ensuring the organism operates efficiently and responds to internal and external changes effectively.