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I. The history of the cell Anton Van Leeuwenhoek A. Anton Van Leeuwenhoek- One of the1 st people to use microscope to study cells.

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Presentation on theme: "I. The history of the cell Anton Van Leeuwenhoek A. Anton Van Leeuwenhoek- One of the1 st people to use microscope to study cells."— Presentation transcript:

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2 I. The history of the cell Anton Van Leeuwenhoek A. Anton Van Leeuwenhoek- One of the1 st people to use microscope to study cells.

3 Robert Hooke B. Robert Hooke-studied cork, the dead cells of oak bark. 1. Hooke described what he was looking at as small box-shaped structures. OR CELLS

4 CELL THEORY C. The work of van Leeuwenhoek, Hooke, and other scientists lead to the CELL THEORY. The cell theory has 3 parts: 1. All organisms are composed of one or more cells. 2. The cell is the basic unit of organization of organisms. 3. All cells come from preexisting cells.

5 D. In the 1940s scientists developed another type of microscope. 1. The electron microscope magnifies structures up to 500,000x 2. This allowed scientists to study the inside of cells.

6 II. Types of cells A. There are two basic types of cells. Prokaryotes 1. Prokaryotes-cells without membrane-bound structures. a. Membrane-bound structures are called organelles (cell parts) Example: Nucleus

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8 Eukaryotes 2. Eukaryotes-cells that have membrane-bound structures (organelles)


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