* Humans: We are complex multicellular organisms with trillions of cells organized into specialized tissues, organs, and organ systems.
* Dogs: Like humans, dogs are mammals and have a wide variety of cells that work together.
* Trees: Trees are incredibly complex multicellular organisms with cells organized into roots, trunks, branches, and leaves.
* Mushrooms: While they might look like plants, mushrooms are actually multicellular fungi.
* Sponges: These simple multicellular organisms have specialized cells, but lack the complex organization of tissues and organs found in more advanced creatures.
Let me know if you'd like more examples!