The levels of organization

Cells

The basic building blocks of life.

The first example is the skin cell.

The second is a plant cell.

The last example is the animal cell.

Tissues

A cellular organizational level intermediate between cells and a complete organ

Three examples would include connective tissue, nervous tissue, and muscle tissue.

Organs

The parts of the body that help it function

The first example is the brain

The second is the heart

The last is the stomach

Organisms

The biotic factors which contain organs tissue and cells

One example is a human

The second is a panda

The last is a fly

Organ systems

What makes up the human bod y

The first example is the lungs

The second is the heart

The last is the brain

The cells make the entire body they are the building blocks of life. The tissue is what is between the cells and a complete organ. The organs are the parts of the body that allow it to function. The organ systems are the way the organs function. The organisms are the biotic factors that all of this happens inside. If the cells were missing the entire organism would not even exist because the cells are the building blocks of life.