Levels of Organization

Unlock the building blocks of life! Learn and define the levels of biological organization with this engaging science worksheet.

ExplanationThere are 13 levels of organization in living things. In order - atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, population, community, ecosystem, biome, and biosphere. In this unit, we will focus on the five highlighted. Watch the video and answer the questions in EdPuzzle, then try the activities below. Match Tissue A group of same cells acting together to perform specific functions Organ A group of tissues working together to perform a specific function Organ System A group of organs working together to perform a specific task Organism An individual living thing, such as a bacterium, plant or animal Cell The smallest unit of life. Organ: Examples in animals include lungs, brain, liver, etc., whereas roots, stem, and leaves are the different types in plants.Tissue: This level is a combination of different types of cells which perform specialized functionsOrgan System: Organs working together to perform certain functions. Examples are the circulatory system in animals, and the vascular system in plants.Organism: the fully functional form of a living being that can thrive in a particular environment.Cell: It is considered as the basic unit and building block of life. It is bound by a cell membrane, and possesses a nucleus which acts as its brain.