Diversity of Cellular Life

1
Diversity of Cellular Life

• Unicellular vs. Multicellular Organisms

2
Unicellular Organisms

• The cell IS the organism
• Protists and Bacteria
• They grow, reproduce, respond to environment, and
  maintain homeostasis
• Colonial Organisms
• Live together, but have no specialization

3
Multicellular Organisms

• Made of many cells
• Cell specialization
• Cells are specialized to perform specific
  functions
• Cells of same type work together
• Can you name some different types of cells found
  in humans?
• Red blood cells, nerve cells, muscle cells, etc.

4
Closer look at cell specialization

• Red blood cells are designed to carry oxygen
• Nerve cells are designed to carry impulses
• Muscle cells are designed to promote movement

5
Multicellular Organization

• Organ Systems (Digestive)
• Organ (Stomach)
• Tissue (Smooth muscle Tissue)
• Specialized cells (Muscle cell)

6
Practice

• Explain the levels of organization involved in
  touch
• Nerve cells
• Brain tissue
• Brain
• Nervous system

7
More practice

• Explain the level of organization for 1 other
  type of cell found in the body
• Construct an analogy that also shows different
  levels of organization (ex. School)