Diversity of Cellular LifeDiversity of Cellular Life

Unicellular vs. Multicellular Unicellular vs. Multicellular OrganismsOrganisms

Unicellular OrganismsUnicellular Organisms

The cell The cell ISIS the organism the organism Protists and BacteriaProtists and Bacteria

They grow, reproduce, respond to environment, and They grow, reproduce, respond to environment, and maintain homeostasismaintain homeostasis

Colonial Organisms:Colonial Organisms: ““Live” together, but have no specializationLive” together, but have no specialization

Multicellular OrganismsMulticellular Organisms

Made of many cellsMade of many cellsCell specialization:Cell specialization:

Cells are specialized to perform specific Cells are specialized to perform specific functionsfunctions

Cells of same type work togetherCells of same type work together Can you name some different types of cells Can you name some different types of cells

found in humans?found in humans?• Red blood cells, nerve cells, muscle cells, etc….Red blood cells, nerve cells, muscle cells, etc….

Closer look at cell specializationCloser look at cell specialization

Red blood cells are Red blood cells are designed to carry designed to carry oxygenoxygen

Nerve cells are Nerve cells are designed to carry designed to carry impulsesimpulses

Muscle cells are Muscle cells are designed to promote designed to promote movementmovement

Multicellular OrganizationMulticellular Organization

Organ Systems (Digestive)

Organ (Stomach)

Tissue (Smooth muscle Tissue)

Specialized cells (Muscle cell)

PracticePractice

Explain the levels of organization Explain the levels of organization involved in touch:involved in touch: Nerve cellsNerve cells Brain tissueBrain tissue BrainBrain Nervous systemNervous system

More practiceMore practice

Explain the level of organization for 1 Explain the level of organization for 1 other type of cell found in the bodyother type of cell found in the body

Construct an analogy that also shows Construct an analogy that also shows different levels of organization (ex. different levels of organization (ex. School)School)