Levels of Organization

1. Organisms

Living individual(s)

2. Organ Systems

Groups of organs that
accomplish a common purpose

3. Organs

Composed of two or more
tissue types that perform a
specific function for the body

4. Tissues

Groups of similar cells that have
a common function

8. Atoms

Tiny building blocks of matter
that combine to form molecules

7. Molecules

Covalently bonded atoms

Ex: Carbohydrates, lipids, etc.

6. Organelles

Specialized structures that carry
out life processes in the cell

5. Cells

Smallest unit of structure and
function of all living things