Answer:
The answer is Cell, Tissue, Organ, Organ System, Organism
Step-by-step explanation:
The basic level of organization for living things starts in the cell. A cell is able to provide specific life functions on its own, including producing its own energy. An example is a simple columnar epithelium.
When cells come together, they form a tissue. A tissue is a group of cells that performs the same functions. An example would be intestinal tissue.
When combined with other tissues, this creates an organ. An organ may be composed of different kinds of tissues and functions, but overall, they act universally. The small intestine is an example.
An organ system is composed of different organs and is able to carry out various functions and may be classified differently with other organ systems. The gastrointestinal system as a whole is an example.