1. Aim: How is life organized?

2. LEVELS OF ORGANIZATION
What does the word, organize, mean?
To put into a certain order
Given the following items, how would you organize them and why?
City, state, country, continent
Why? It goes from small to big

3. Why do we need to organize in our lives?
So things can efficiently work together

4. Why do living things need to be organized?
The twelve organ systems of the human body need to work together to maintain _________.
What is the basic unit of all life?
homeostasis
CELLS

5. Let’s look at an example of human organization
What type of cell do you think we are looking at?

6. Do we only have 1 muscle cell in our body?
Cells working together are called Tissue.

7. Where do we find muscle tissue?
Many tissues working together are called Organs.

8. How can we combine the different muscular organs?
Many organs working together make up an organ systems.

9. ORGANISM
Organisms are comprised of many integrated organ systems that work together to maintain a constant stable internal environment.

10. Multicellular Organisms
Can you put these in order? A B C D E
Organ system
Organ
Cell
Tissue
Organism

11. Levels of organization

12. What system is it?
Nervous
Integumentary
Skeletal
Muscular
Circulatory

13. What about unicellular organisms?
Unicellular organisms do not have Organ systems, but they
have __________ which are much simpler, but are equally
capable of carrying out metabolic activities.
organelles

14. What is the overall goal of our organ systems?
The organ systems work together to maintain homeostasis.
In other words, the organ systems maintain an internal
stability despite an always changing environment.

15. Single-Celled vs. Multicellular:
Function
Single Cell
Multicellular
Gas Exchange
Transport of Substances
Nutrition
Excretion

16. Single-Celled vs. Multicellular:
Function
Single Cell
Multicellular
Gas Exchange
Cell membrane
lungs
Transport of Substances
cytoplasm
Blood, circulatory system
Nutrition
Mouth/digestion
Excretion
Urinary tract

17. What system is it?
Respiratory

18. What system is it?
Digestive

19. What system is it?
Kidney & Bladder
Skin
Excretory System

20. What system is it?
Immune System
Endocrine System

21. ATOM
ATOMS ARE THE SMALLEST UNIT OF MATTER THAT PARTICIPATE IN CHEMICAL REACTIONS.
Examples: Nitrogen, Oxygen, Phosphorus, Carbon

22. Molecules are two or more atoms that are chemically combined.
Can you guess what this molecule is?
Hint: It is the most important molecule on earth.

23. What system is it?
Male Reproductive

24. What system is it?
Female Reproductive