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Structural Hierarchy in Animals

Explore the levels of cellular organization in animals, from cell differentiation and stem cells to tissue, organ, and organ system formation. Learn how these systems work together to enable mobility and activity.

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Structural Hierarchy in Animals

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  1. Structural Hierarchy in Animals

  2. Cell Differentiation • The process by which a cell becomes specialized to perform a specific function. • Directed by genetic information inside the cell • An undifferentiated Cell is called a stem cell

  3. Cell Differentiation • Stem Cells • Cells which can develop into different types of cells depending on which parts of DNA are switched on.

  4. Stem Cells

  5. Stem Cells • Embryonic Stem Cells • can differentiate intoany kind of cell. • Tissue Stem Cells • only able to differentiate into certain types of cells.

  6. Video • Stem Cells

  7. Building An Organism! • Levels of Organization or Hierarchy in Animals • Forms a pyramid with the most complex structure at the top, and least complex at the bottom

  8. Organism Organ System Organ Tissue Cell

  9. Tissues – a group of specialized cells which provide a specific function ex. Epithelial tissue, connective tissue, muscle tissue or nerve tissue

  10. Organs – a group of specialized tissues working together to perform a specific function • ex. Stomach, heart, • lungs or • muscles

  11. Organ Systems – a system of one or more organs/structures that work together to perform a major vital body function ex. Obtain and distribute oxygen and nutrients

  12. Pulling It All Together

  13. Thinking/Inquiry Question • Explain how 3 organ systems work together to enable you to be mobile and active.

  14. Vocabulary Stem Cells Embryonic Stem Cells Tissue Stem Cells Hierarchy Tissue Organ Organ System

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