1. Levels of Organization

3. We begin our journey with the atom
The atom is the smallest particle that maintains it’s properties
Remember! The atom is made of protons, neutrons and electrons

4. Next, the molecule
Two or more atoms bonded together
Fat

5. Followed by the organelle
Remember – “organelle” means “little organ”
Several molecules bonded together form the organelles, which are found inside of your cells

6. And then, the cell
The basic unit of structure and function of living things

7. We interrupt this story for a quick review…
The three parts of the cell theory are…
All living things are made up of one or more cells
Cells are the basic units of structure and function in living things
Cells come only from other living cells

8. Now back to your regularly scheduled PowerPoint…

9. Which makes up the tissues
A group of cells that look alike and work together

10. Kinds of tissue
Muscle tissue – made of cells that can become shorter (contract) and move bones

11. Epithelial (covering) tissue – made of epithelial cells that are tightly joined together, protect the body (our skin!)

12. Kleenex tissue – used to blow your nose

13. Connective tissue – these cells work together to hold parts of the body together.
Examples include bone, ligaments, tendons and blood

14. Nerve tissue – made up of nerve cells or neurons, and carries messages throughout the body
Nerve tissue makes up most of your brain and spinal cord
Nerves make muscles act, and controls breathing, digestion and heartbeat

15. And tissues make up organs
A group of two or more tissues that work together to do a special job
Examples include the heart, brain, and stomach

16. The organs make up organ systems
Groups of organs working together to carry out life processes and keep an organism alive
Organ systems include digestive, endocrine, excretory, circulatory, and nervous

17. And our story comes to an end (for now) with the organism… which is made up of all of the organ systems functioning together

18. An organism…