Cells: A Review A Little History. . . English scientist, Robert Hooke (1665) looked at cork through a compound microscope saw tiny, room-like structures called these structures 'cells' saw only outer walls - cork cells are not alive ( But they used to be! )
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English scientist, Robert Hooke (1665)
The work of Schleiden, Schwann and Virchow led to the development of the cell theory.
Some complete organisms are made of only one cell.
Some are made of only a few cells.
Others are made of many cells. Leeuwenhoek (1680)
Cell Membrane - forms
the outer boundary of the
cell and allows only certain
materials to move into or
out of the cell
Nucleus Leeuwenhoek (1680) - directs the activity of a cell; it contains chromosomes made of DNA
Nuclear Membrane - separates the nucleus from the rest of the cell
Endoplasmic Reticulum Leeuwenhoek (1680) - moves materials around in the cell
(called ER for short)
Golgi Bodies - are used for
packaging and secreting; “hunks” of ER pinch off to form Golgi bodies
Ribosomes Leeuwenhoek (1680) - make protein for the cell
Vacuoles cell - are storage areas for the cell
exocytosis and endocytosis
Cytoplasm - a gel-like material inside the cell that is made of water & nutrients
We will look at these cells! of water & nutrients
Elodea cells (plant)
micro = small
scope = to look
Electron of water & nutrients