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Unveiling the Complexity of Cells

Discover the significance of cells as the basic units of life, from theories to diverse cell types and their functions, including prokaryotes and eukaryotes. Explore the structure-function relationship, organelles, and the fluid mosaic model of the cell membrane. Enhance your knowledge for exams!

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Unveiling the Complexity of Cells

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  1. Cells Basic Building Block of Life

  2. Cell Theory • Cells are the basic units of structure & function in living organisms. • All living organisms are composed of 1 or more cells. • Schleiden: all plants composed of cells • Schwann: all animals composed of cells • All cells come from preexisting cells. • Virchow contributed this.

  3. Prokaryotes • First life form: Archaea & Bacteria • Note cell wall & cytoplasmic membrane • No membrane-bound organelles • DNA in nucleoid • Ribosomes present • Errors in figure • Flagellum, singular • Cytosol

  4. Different Cell Types

  5. Eukaryotes • Protists, Fungi, Plants, & Animals • Have membrane-bound organelles • Nucleus with nucleolus • Endoplasmic reticulum: rough & smooth • Golgi apparatus • Mitochondrion • Chloroplasts, Chromoplasts, & other plastids • Vacuoles: plants’ 1 central vacuole; animals- many • Vesicles: lysosomes, peroxisomes, glyoxysomes

  6. Characterized Animal Cell

  7. Blood Cell Types & Their Development

  8. Things to know for the Exam • Cell types • Structure-function relationship • Form follows function. • Size varies greatly. • Organelles specific for animals vs. plants • Function of all organelles. • Plasma membrane structure & function.

  9. Cell membrane: Fluid mosaic model

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