Biology Basics: Levels of Organization

Front

Cell

Back

The basic structural and functional unit of living organisms

Front

Tissue

Back

A mass of similar cells that perform a specialized function

Front

Organ

Back

A collection of tissues joined together into a structure that performs specialized functions

Front

Organ System

Back

A group of interacting, interrelated, or interdependent elements forming a complex whole

Front

Organism

Back

A self-contained living thing

Front

Specialized

Back

Having characteristics that allow specific functions to be performed.