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Cellular Hierarchy

Cellular Hierarchy. S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms. Cellular Hierarchy. Cells (Least complex) Tissues Organs Organ systems Organism (Most complex). Unicellular. Only one cell

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Cellular Hierarchy

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  1. Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms.

  2. Cellular Hierarchy Cells (Least complex) Tissues Organs Organ systems Organism (Most complex)

  3. Unicellular • Only one cell • The single cell carries out all life functions. • Examples • bacteria • amoebas

  4. Multicellular • Composed of many cells • Cells group together and divide labor • Cells become specialized for specific functions • Cells take on special shapes because of special jobs • Examples • blood cells, nerve cells, liver cells, muscle cells, skin cells

  5. Tissues • Cells grouped together to perform the same function • Four basic types in the body • Epithelial tissue (skin, ducts, and tubes) • Connective tissue (cartilage and blood) • Muscle tissue (moves bones, digestive organs and heart) • Nervous tissue (carries messages)

  6. Organs • Several types of tissues grouped together • Usually perform a complex task • Examples • Brain • Heart • Stomach • Lungs

  7. Organ Systems • Several organs working together for a particular function • Examples • Digestive system • Circulatory system • Nervous system

  8. Examples of Cellular Hierarchy

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