1. Organization of the Human Body

2. Cellular Organization
Cells
Basic unit of structure and function
Cells tend to be specialized
Bone cell, Blood cell, Muscle cell
Tissues
Group of cells that perform a single function
4 types
Epithelial (interior/exterior of body surface)
Connective (provides support: bone cell, blood cell, fat cell)
Nervous (nerve impulses are transmitted)
Muscle (cause movement of the body)

3. Cellular Organization Cont.
Organs
Group of different tissues that work together to perform a function
Example: Eye
Composed of: epithelial, nervous, muscle and connective tissue.
Function: Sight
Organ Systems
Group of organs that perform closely related function
Example: Digestive System
Composed of: mouth, pharynx, esophagus, stomach, small and large intestine, rectum

4. Cellular Hierarchy

5. Homeostasis Most organ systems strive for Homeostasis Homeostasis
Maintain a controlled, stable internal environment
Relatively constant internal physical and chemical conditions that organisms maintain despite changes in the internal/external environment.
Example

7. Metabolism The sum of all chemical reactions in the body
The reactions that take place to maintain homeostasis.
Ex. Breaking down of glycogen into glucose to increase sugar in the blood.