HELP ME PLS

How can an organ, such as the lungs, work for multiple body systems?

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.