*Saw empty cubicles that he called “CELLS”

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Presentation transcript:

*Saw empty cubicles that he called “CELLS” The Discovery of Cells 1665 Robert Hooke *Used a primitive microscope to examine cork *Saw empty cubicles that he called “CELLS”

The Discovery of Cells 1838 Matthias Schleiden *Studied lots of plants *Concluded that all plants are made of cells

All animals are composed of cells The Discovery of Cells 1839 Theodor Schwann All animals are composed of cells

All cells come from other living things. The Discovery of Cells 1858 Rudolph Virchow All cells come from other living things.

The Cell Theory All organisms are composed of cells. The cell is the basic unit of structure and function. All cells are produced from other cells.

Unicellular vs. Multicellular Unicellular- single celled Examples: bacteria, yeast, Amoeba, some algae Carry out all life processes in one cell.

Unicellular vs. Multicellular Multicellular- many celled Evolved from unicellular organisms Cells are specialized to perform certain functions Examples: nerve cells- carry impulses leaf cells- photosynthesize

Plant vs. Animal Plant Cell wall One large vacuole Chloroplasts No centrioles Rectangular shape Animal No cell wall Small vacoules No chloroplasts centrioles Various shapes

TYPES OF CELLS PROKARYOTIC Small No nucleus No membrane bound organelles Example: bacteria

TYPES OF CELLS EUKARYOTIC Larger More complex Contain membrane bound organelles Contain a nucleus Example: plant and animal cells

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