The Levels of Organization

Tissue is made of a group that is similar to cells that work together to do a  job in the body.

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

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

Organ systems are organs that work together to preform a job.

Example: Human organ systems include circulatory, reproductive, digestive, nervous, respiratory.

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

a population is a group of the same type of organisms all living together in the same place.

an ecosystem is an population living together in one area.

biosphere is the ecosystems all around the world make up the biosphere