Here's a breakdown:
* Cells: The basic building blocks of all living things.
* Tissue: A collection of similar cells that work together to perform a specific function.
* Organ: A structure made up of different tissues that work together to carry out a complex function.
* Organ System: A group of organs that work together to perform a major bodily function.
Examples of Tissues:
* Muscle tissue: Contracts to produce movement.
* Nervous tissue: Carries electrical impulses to transmit information.
* Connective tissue: Supports and connects other tissues.
* Epithelial tissue: Covers and protects the body's surfaces.
