1. BODY ORGANIZATION AND HOMEOSTASIS
Levels of organization
Cells
Tissues
Organs
Organ Systems

2. Systems

3. Cells Basic unit of function and structure in organisms.
Structure of cells:
cell membrane, cytoplasm, mitochondria, nucleus, nuclear membrane, nucleolus, chromosomes, ribosomes, golgi apparatus, endoplasmic reticulum, vacuoles, lysosomes
Function of cells:
To carry on processes that keep cells alive
First level of organization
Cells specialize

4. ANIMAL CELL

5. What are the Types of Tissues
Second level of organization in the body.
Similar cells that have specialized and perform the same function.
4 basic types
Muscle
Nervous
Connective
Epithelial

6. Muscle Tissue
Muscle cells can contract and relax to move body parts and materials.

7. Nervous Tissue
Directs and controls the processes in the body by sending electrical messages back and forth.
This enables you to see, hear, think, and move.

8. Connective Tissue
Provides supports parts of the body and connects all the parts.
Includes bone, fat, and blood.

9. Epithelial Tissue
Covers and lines the surfaces of the body, internally and externally.
Contains specialized glands.
Includes:
skin, hair follicles, sebaceous glands, lining of the digestive system.

10. Homeostasis
The process by which an organisms internal environment is kept stable, in spite of changes in the external environment.

11. Maintaining Homeostasis
Homeostasis in action
Ex. No matter what the air temperature, your internal body temperature will remain close to 37˚ C.
Maintaining Homeostasis
Ex. If the room is too warm, you will sweat. If the room is too cold you will shiver.