1. Levels of Organization

2. Organelles
“Tiny organs”
Made of macromolecules

3. Cell
Made of organelles
Basic unit of structure & function
LIVING

4. Tissue
The same kind cell working together
Living

5. Organs
Tissues that work together
Living

6. Systems
Organs that work together
Living

7. Organism Entire living things (organisms) Usually made of systems
May be a single cell
Living

8. Population
Same type of organism living together

9. Community
Several populations living together
Population interact

10. Cells: LOTS of Different Kinds. Here are two examples
Cells: LOTS of Different Kinds! Here are two examples. Can you guess what kind?
Nerve Cells
Skin Cells

11. Let’s Look Again…
Here are the cells we saw before, but if you look closely, you can see that they all look similar. Nerve cells working together make nerve tissue, and skin cells make up a special type of epithelial tissue.

12. Taken One At A Time….
Connective tissue connects and supports parts of the body. Blood, fat, ligaments, cartilage, bones, and tendons are all connective tissues.
Nerve tissue carries messages back and forth between the brain and every other part of the body. The brain, spinal cord, and nerves are made up of nerve tissue.
Epithelial tissue covers and lines the surfaces of your body and organs, inside and out. They primarily serve as protective barriers. Skin is one example.
Muscle tissue can contract, or shorten. Because of this, muscle tissue makes parts of your body move.

13. Level Three: Organs When a bunch of different types of tissues work together, they form an organ. There are many organs in the body. How many can you name??
GET IT????

14. Level Four: Organ Systems
Each organ in your body is part of an organ system, a group of organs that work together to perform a major function.
For example, your heart is part of your circulatory system, which carries oxygen and other materials throughout your body. Besides the heart, blood vessels are organs that work in your circulatory system.

15. The nervous system detects and interprets information from the environment outside the body and from within the body; controls most body functions.
The immune system fights disease.
The excretory system removes wastes.
The endocrine system controls many body processes by means of chemicals, like hormones.

16. The muscular system enables the body to move; moves food through the digestive system, and keeps the heart beating.
The skeletal system supports and protects the body, and works with the muscular system to allow movement; makes and stores blood cells and stores some other materials.

17. The digestive system takes food into the body, breaks the food down into smaller particles, and absorbs the digested materials.
The respiratory system takes oxygen into the body and eliminates carbon dioxide.
The reproductive system produces sex cells that can unite with other sex cells to create offspring; controls male and female characteristics.

18. Let’s Review…. 1st Level: Cells working together form
2nd Level: Tissues, which can form
3rd Level: Organs, which work together to form
4th Level: Organ Systems, which work together to form
5th Level: Organisms!