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Life is Cellular

Delve into the fascinating history of cell discovery from Robert Hooke to modern microscopy techniques. Learn about the cell theory, different types of cells, and how scientists use microscopes to explore their structures. Discover the beauty and complexity of cells in this informative journey.

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Life is Cellular

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  1. Life is Cellular 7.1 P. Smith Bio CP

  2. The invention of the microscope in the 1600s enabled researchers to see cells for the first time. Robert Hooke named the empty chambers he observed in cork “cells.” The Discovery of the Cell Robert Hooke’s Microscope

  3. Robert Hooke The Discovery of the Cell Robert Hooke’s Microscope

  4. Anton van Leeuwenhoek was the first to observe living microorganisms. Anton van Leeuwenhoek The Discovery of the Cell

  5. Matthias Schleiden: 1837 - all plants are composed of cells. The Discovery of the Cell

  6. Theodor Schwann 1837 - all animals are composed of cells. The Discovery of the Cell

  7. Rudolf Virchow 1858 - All living cells are derived from previously existing cells The Discovery of the Cell

  8. Discoveries by German scientists Schleiden, Schwann, and Virchow led to the development of the cell theory. The Cell Theory All living things are made of cells. Cells are the basic units of structure and function in living things. New cells are produced from existing cells. The Discovery of the Cell

  9. Scientists use light microscopes and electron microscopes to explore the structure of cells. Compound light microscopes have lenses that focus light. They magnify objects by up to 1000 times. Exploring the Cell Compound Light Microscope

  10. Chemical stains and fluorescent dyes make cell structures easier to see. Exploring the Cell

  11. Transmission Electron Microscope (TEM) Uses beams of electrons to examine thin slices of material Provides two-dimensional images of cell structures Exploring the Cell

  12. Transmission Electron Microscope (TEM) Exploring the Cell Pollen grains HIV Virus

  13. Scanning Electron Microscope (SEM) Uses beams of electrons to view the surface of a specimen Provides three-dimensional images of cells Exploring the Cell

  14. Scanning Electron Microscope (SEM) Scientists use computers to add color to electron micrographs, which are photos of objects seen through a microscope. Exploring the Cell

  15. Cells come in an amazing variety of shapes and sizes, but all cells contain DNA. All cells are surrounded by a thin flexible barrier called a cell membrane. There are two basic categories of cells based on whether they contain a nucleus. The nucleus (plural: nuclei) is a large membrane-enclosed structure that contains DNA. Eukaryotesare cells that enclose their DNA in nuclei. Prokaryotes are cells that do not enclose their DNA in nuclei. Prokaryotes and Eukaryotes

  16. Prokaryotes are cells that do not enclose their DNA in nuclei. Bacteria Prokaryotes

  17. Eukaryotesare cells that enclose their DNA in nuclei. Animal Cells Eukaryotes

  18. Eukaryotesare cells that enclose their DNA in nuclei. Plant Cells Eukaryotes

  19. Eukaryotesare cells that enclose their DNA in nuclei. Protists Paramecium Amoeba Eukaryotes

  20. Eukaryotesare cells that enclose their DNA in nuclei. Fungi Eukaryotes

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