Are organisms made out of cells?

Yes, organisms are made out of cells, which are the fundamental building blocks of life. All living organisms, from single-celled bacteria to complex multicellular organisms like plants and animals, consist of one or more cells. Cells perform essential functions necessary for growth, reproduction, and maintaining homeostasis. The cell theory, a foundational concept in Biology, states that all living things are composed of cells and that cells are the basic unit of life.