Here's a breakdown:
* Cells: The basic unit of life, each performing specific functions.
* Tissues: A collection of similar cells that work together to carry out a specific function.
* Organs: Structures made up of different tissues that work together for a common purpose.
* Organ Systems: A group of organs that work together to perform a major bodily function.
* Organism: A complete living being made up of organ systems.
Examples of tissues:
* Muscle tissue: Contracts to enable movement.
* Nervous tissue: Transmits signals throughout the body.
* Connective tissue: Supports and connects other tissues (e.g., bone, cartilage, blood).
* Epithelial tissue: Covers surfaces and lines cavities (e.g., skin, lining of the digestive tract).
