* Organisms are self-sufficient: Organisms are complete living entities capable of independent survival. They have all the necessary systems for metabolism, reproduction, and response to the environment.
* Brain cells are part of a larger system: Neurons are specialized cells within the brain, an organ. They rely on other cells and systems within the body to function.
* Brain cells cannot survive independently: A single neuron isolated from the body would quickly die. It requires the support of other cells, oxygen, nutrients, and a stable environment provided by the body.
In summary: A brain cell is a component of a larger organism (the human body), not an independent organism itself.
