Living organisms have special body parts that help them survive, grow, move, and live in their environments. Plants use roots, stems, and leaves to absorb water, make food, and stay strong, while animals use organs and body structures such as lungs, hearts, wings, fins, and muscles to perform important life functions. The structure of each part is connected to its job, showing how living things are designed to meet their needs. Scientists study structure and function to better understand how org