Structure
Structure explained in an easy to understand way:
Imagine trying to assemble a large jigsaw puzzle without knowing what the final picture is supposed to look like. This situation is similar to understanding how the parts of an organism function together as a whole. Just as each puzzle piece contributes to forming the complete picture, each part of an organism, like cells, tissues, and organs, plays a specific role that contributes to the overall functioning and survival of the organism.
Practice Version
Structure: The parts of an organism as a whole. Structure. In science, structure refers to how something is organized or arranged.