Which of the following lists three units of an organ system in order from the simplest to the most complex?

• A. Cell, Tissue, Organ
• B. Organ, Tissue, Cell
• C. Organ, Cell, Tissue
• D. Tissue, Cell, Organ

Answer: (A)

Verified step by step guidance

1. Understand the hierarchy of biological organization in the human body, which progresses from the simplest to the most complex structures.
2. Recognize that a cell is the basic unit of life and the simplest structure in the hierarchy.
3. Identify that tissues are groups of similar cells that perform a specific function, making them more complex than individual cells.
4. Understand that organs are composed of multiple types of tissues working together to perform complex functions, making them more complex than tissues.
5. Arrange the units in order from simplest to most complex: Cell, Tissue, Organ.