LEVELS OF ORGANIZATION

1
LEVELS OF ORGANIZATION
2
CELL

• Basic unit of structure and function in living
  things
• Humans have over 200 types of cells
• Differ in size / shape / function
• Largest is ostrich egg yolk

3
TISSUE

• Group of cells WORKING TOGETHER
• muscle / cardiac / epithelial

4
ORGAN

• Group of tissues WORKING TOGETHER
• Largest organ is skin
• Kidney / stomach / heart

5
ORGAN SYSTEM

• Group of organs WORKING TOGETHER
• 11 organ systems / p. 909

6
11 organ systems

• Skeletal provides protection and
  support
• Muscular provides movement
• Integumentary protects against pathogens

7
11 organ systems

• Cardiovascular / circulatory transports
  nutrients and wastes
• Respiratory exchanges gases
• Immune protects against infection

8
11 organ systems

• Digestive breaks down and absorbs food
• Excretory filters wastes
• Nervous receives stimuli and responds

9
11 organ systems

• Endocrine regulates metabolism
  produces hormones
• maintains homeostasis
• Reproductive
• produces gametes
• Egg / sperm

10
ORGANISM

• Groups of organ systems WORKING TOGETHER
• A living thing
• Unicellular / Multicellular