While we are made up of trillions of cells, each cell is part of a larger, complex organism.
Here's why:
* Multicellularity: Humans are multicellular organisms, meaning we are composed of many cells working together.
* Specialized Cells: Different cells in the body have specific functions (muscle cells, nerve cells, etc.). They depend on each other for survival.
* Organ Systems: Cells form tissues, tissues form organs, and organs work together as systems.
However, there are single-celled organisms (microorganisms) that can live within the human body, such as bacteria and some types of fungi. These are not part of the human body itself.
