The Levels of Organization

  • 1. Cells
  • 2. Tissues
  • 3. Organs
  • 4. Organ Systems
  • 5. Organisms
  • 6. Population
  • 7. Ecosystem

    The cell is the basic unit of structure and function of a living thing.

    Cells are specialized by size and shape for the job they do

    Tissues are made of a group of similar cells that work together to do a specific job in the body.

    Organs are made up of two or more tissues that work together to do a specific job.

    An organ system is a group of organs working together to perform particular jobs.

    Sum of all cells, tissues, organs and organ systems makes an organism. An organisms is made when a group of organ systems work together.

    Sum of all cells, tissues, organs and organ systems makes an organism. An organisms is made when a group of organ systems work together.

    A group of the same type of organisms all living together in the same place.

    All the ecosystems around the world make up the biosphere.