1. Mrs. Wharton’s Science Class
Body Organization and Homeostasis

2. How is the Body Organized?
Levels of organization in the human body consist of:
Cells
Tissues
Organs
Organ systems

3. Definitions
Cell
Basic unit of structure and function of living things.
Examples: Blood cells, Bone cells, nerve cells, skin cells

4. Definitions
Tissues
Made of cells. Similar in structure and function and are joined together.
Examples: Blood, bone tissue, nerve tissue, skin tissue, muscle tissue.

5. Definitions
Organs
Structure made of groups of different tissues that work together
Examples: Heart, Brain, Kidney, liver, Skin, Lung, Bone , Stomach

6. Definitions Organ Systems
Group of organs that work together to perform a specific function.
Example: Circulatory system, Digestive system, Nervous system

7. Body Systems
Different organ systems work together and depend on one another ( ie: riding a bike)
Our body systems regulate the internal environment and strive to give our cells the necessary conditions they need to function. They work together to benefit the ENTIRE organism