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The Discovery of the Cell – Journal Notes

The Discovery of the Cell – Journal Notes. Organization of Life. In the 1500s we knew organisms were made of organ systems, organs and tissues. But we didn’t know the basic unit of living things. Robert Hooke. Mid 1600s: observed cork (bark from cork tree) under simple microscope

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The Discovery of the Cell – Journal Notes

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  1. The Discovery of the Cell – Journal Notes

  2. Organization of Life • In the 1500s we knew organisms were made of organ systems, organs and tissues. But we didn’t know the basic unit of living things.

  3. Robert Hooke Mid 1600s: observed cork (bark from cork tree) under simple microscope Called what he saw “cells”

  4. Anton van Leeuwenhoek Late 1600s: improved the microscope and observed microorganisms.

  5. Matthias Schleiden • In 1838: “all plants are made of cells”

  6. Thomas Schwann • In 1839: “all living things are made of cells”

  7. The Levels of Organization of Life

  8. Rudolph Virchow • In 1855: “all new cells came from pre-existing cells.” • -Evidence against “spontaneous generation”

  9. The Cell Theory Three Parts: • All organisms are made of cells. • The cell is the most basic unit of life. • All existing cells are produced by other living cells.

  10. Technology • It was technology (the microscope) that allowed us to see cells. • Technology is vital to scientific advances. • As technology improves so does our understanding of life, the world, the universe…

  11. The Microscope

  12. Types of Cells • Eukaryotic • Animal, Plant, Protista, Fungi. • Have a nucleus • DNA is surrounded by the nuclear membrane. • More advanced and complex than prokaryote cells. • Have Organelles. • Prokaryotic • First living things on the planet. • Evolved over 3 billion years ago • Simple – No complex internal parts. • No nucleus. • DNA is circular, not in a membrane. • Known as Bacteria.

  13. Types of Cells: Prokaryotes Bacteria

  14. Types of Cells: Eukaryotes Protists

  15. Types of Cells: Eukaryotes Animals Neurons Fat Cells

  16. Types of Cells: Eukaryotes Animals Blood Cells Muscle Cells

  17. Types of Cells: Eukaryotes Plants Leaf cells

  18. Types of Cells: Eukaryotes Fungi Chytrid Fungus

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