Here's why:

* Organism Definition: An organism is a living being made up of one or more cells that can carry out all the functions of life. This includes things like:

* Growth and development: Humans grow and change throughout their lives.

* Metabolism: Humans take in nutrients, break them down, and use them for energy.

* Reproduction: Humans have the ability to reproduce.

* Response to stimuli: Humans react to their environment.

* Homeostasis: Humans maintain a stable internal environment.

* Human Structure: Humans are complex multicellular organisms with specialized cells, tissues, organs, and organ systems that work together to maintain life.

So, humans fit the definition of an organism in every way.