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Levels of Organization
Levels of Organization
There are many levels of organization. They go from smallest to largest, cell, tissue, organ, organ system, and organism.
Cells
Cell
Cells are the smallest unit of life. The basic unit of structure in an organism. All plants and animals, including humans, are made of cells.
Tissue
Tissue
The Four Main Tissues
Function
The four main tissues are connective tissue, nerve tissue, muscle tissue, and epithelial tissue.
A tissue is a group of similar cells that work together to perform a particular function.
Organ
Organ
Organs are the third part of the levels of organization. It is a group of tissue that work together to perform a task. The bodies functions are connected by organs. The heart, lungs, liver, eyes,and stomach are all organs.
Organ System
Organ System
Some examples of an organ system are digestive, respiratory, and nervous system.
The organ system is a group of organs that work together to perform a specific function.
Organism
Organism
The organism is a living thing. Humans, animals, and plants are some examples of organisms. This is the last level of organization.