Cell Organ following terms: Organ System

To understand the relationship between "Cell," "Organ," and "Organ System," let's break down each term: 1. **Cell**: The basic unit of life. Cells are the smallest structural and functional units of an organism. They can exist as independent units (like bacteria) or as part of multicellular organisms (like plants and animals). 2. **Organ**: A group of tissues that work together to perform a specific function. For example, the heart is an organ made up of muscle tissue, connective tissue, and nerve tissue, all working together to pump blood. 3. **Organ System**: A group of organs that work together to perform complex functions for the body. For example, the circulatory system includes the heart, blood vessels, and blood, all working together to transport nutrients and oxygen throughout the body. ### Relationship: - Cells combine to form **tissues**. - Tissues combine to form **organs**. - Organs combine to form **organ systems**. This hierarchical structure illustrates how life is organized from the smallest unit (cell) to complex systems that sustain life (organ systems).