lEVELSOFoRGANIZATION

The basic unit of life. All living things are made of cells.
🧠 Example: A nerve cell or blood cell.

A group of similar cells working together to do a specific job.
💪 Example: Muscle tissue helps you move.

A structure made up of different tissues that work together to perform a function.
❤️ Example: The heart pumps blood.

A group of organs working together to perform a major body function.
💓 Example: The circulatory system includes the heart, blood, and blood vessels.

A complete living thing made of organ systems that work together to keep it alive.
👩‍🦰 Example: A human, dog, tree, or bacteria.

A group of the same species living in the same area at the same time.
🦁 Example: A pride of lions in the grasslands.

1. The entire Earth where life exists—including land, water, and air.
   🌍 Example: The global environment that supports all living things.