Levels of Organization

The Cell

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

Examples:

Single Celled Organisms (Amoeba)

Cells of Multi Cellular Organisms (Red Blood Cells)

animal cell

T I S S U E S

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

Examples: 4 different types of animal tissues are epithelial, muscle, nervous, and connective.

Organs

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

Example: a heart is an organ made of all four tissues.

Organ Systems

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

Example: Human organ systems include circulatory, reproductive, digestive, nervous, respiratory.Plant organ system-roots, stems,leaves= transport system.

Population

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

Ecosystem

Populations living together in one area.

Biosphere

All the ecosystems around the world make up the biosphere.