What term describes the structures within a cell that help it to function?

The term that describes the structures within a cell that help it to function is "organelles." Organelles are specialized components within a cell that perform distinct processes necessary for the cell's life and function, much like organs do for the body as a whole.

For example, mitochondria are organelles that produce energy through cellular respiration, while ribosomes are responsible for protein synthesis. This division of labor among various organelles allows the cell to operate efficiently and respond to its environment.

On the other hand, terms like organs, tissues, and systems refer to structures at a larger scale in the body. Organs are made up of tissues that work together to perform specific functions, while tissues are groups of cells that perform a similar function, and systems are groups of organs that work together to carry out complex processes. These concepts, while important for understanding the body's structure, do not directly describe the specific internal structures of a cell.