1. Levels of Organization

2. ATOMS
Smallest part of matter
NON-living

3. Molecules
2 or more bonded atoms
Form compounds
NON-living

4. Macromolecule Very large molecules
Proteins, fats, carbohydrates, nucleic acids
NON-living

5. Organelles
“Tiny organs”
Made of macromolecules

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

7. Tissue
The same kind cell working together
Living

8. Organs
Tissues that work together
Living

9. Systems
Organs that work together
Living

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

11. Population
Same type of organism living together

12. Community
Several populations living together
Population interact

13. Ecosystem
A biotic (living) community plus the abiotic (nonliving) features

14. Biome
Similar ecosystems on earth together

15. Biosphere Whole living layer around the globe
Includes abiotic features

16. Tissue Organ System Organism Atom Molecule Macromolecule Organelle
Cell
Tissue
Organ
System
Organism
Population
Community
Ecosystem
Biome
Biosphere

17. Body Organization and Structure

18. HOMEOSTASIS My Beloved Cells I will miss you!
If homeostasis is interrupted, cells suffer and sometimes die.
The human body’s maintenance of a stable internal environment.
My Beloved Cells
I will miss you!

19. THE WORK OF CELLS
On a baseball team, every player has his job.
Cells have their own positions (or jobs) in the body!

20. RED BLOOD CELLS

21. Groups of cells working together form a TISSUE
There are 4 types of tissues:
Epithelial Tissue
Nervous Tissue
Muscle Tissue
Connective Tissue

22. EPITHELIAL TISSUE
Covers and protects underlying tissue. When you look at the surface of your skin, you see epithelial tissue

23. NERVOUS TISSUE
Sends electrical signals through the body. It is found in the brain, nerves and sense organs.

24. MUSCLE TISSUE
Made up of cells that can contract and relax to produce movement

25. CONNECTIVE TISSUE
Joins, supports, protects, insulates, nourishes, and cushions organs. It also keeps organs from falling apart.

26. TISSUE + TISSUE= ORGAN
Two or more tissues working together, form an organ.
One type of tissue alone cannot do all of the things that several types working together can do.

27. ORGAN + ORGAN = ORGAN SYSTEM
Organs working together
make up an organ system.
The failure of any part can affect the entire system

28. 11 MAJOR ORGAN SYSTEMS Integumentary system Muscular system
Skeletal system
Cardiovascular system
Respiratory system
Urinary system
Reproductive system.
Nervous system
Lymphatic system
Digestive system
Endocrine system

29. Integumentary System
Includes skin, hair, nails and their underlying tissues
It’s Function is to:
Protect us from germs
Excrete waste
Controls moisture
Contains nerve ending
Regulates body temp

30. Function: Is movement and protection.
Muscular System
Three types of muscles:
Smooth Muscle
Cardiac Muscle
Skeletal muscle
Plus tendons & ligaments
Function: Is movement and protection.

31. Skeletal System Bones & cartilage
Frame & support, protect, store minerals, make blood cells

32. Cardiovascular System
Heart, Veins, Arteries capillaries
Function:
To transport oxygen & nutrients throughout the body

33. Respiratory System Lungs absorb oxygen and release carbon dioxide.
Lungs, trachea and alveoli
Lungs absorb oxygen and release carbon dioxide.

34. Removes wastes from the blood and regulates body fluids.
Urinary System
Removes wastes from the blood and regulates body fluids.

35. Reproductive System Testes, Penis Uterus, Ovaries Function: Offspring

36. Receives and sends electrical messages.
Nervous System
Includes:
Brain, Spinal Cord & Nerves
Receives and sends electrical messages.

37. Lymphatic System
Lymph Nodes & Vessels
Function:
Returns leaked fluids to blood vessels and fights germs & Disease

38. Digestive System Function: Breaks down food into nutrients.
Stomach & intestines
Function:
Breaks down food into nutrients.

39. Endocrine System
Glands regulate body functions by sending out chemical messages.

41. DISCUSSION QUESTIONS
1. Explain the relationship between cells, tissues, organs and organ systems.
2. Compare the four kinds of tissues found in the human body.
3. Describe a time when homeostasis was disrupted in your body.
Which body systems do
you think were effected?

42. T/F QUICK QUIZ
Homeostasis is the maintenance of a stable internal environment.
Epithelial tissue sends electrical signals throughout the body.
Blood is a type of connective tissue.
The endocrine system consists of skin, hair, nails and their underlying
tissue.
5. The lymphatic system returns
leaked fluids to blood vessels.