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cell structure
key terms
11
Biology
10th Grade
11/16/2010

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Term
cell
Definition
collection of living matter enclosed by a barrier that seperates the cell from its surrounding its also a basic unit of all life
Term
cell theory
Definition
idea of all living things are composed of cells, cells are basic units of structure and function in living things, and new cells are produced from existing cells
Term
cell membrane
Definition
thin, flexible barrier around a cell. it regulates what enters and leaves the cell
Term
cell wall
Definition
strong layer around the cell membrene in plants, algae, and some bactiria
Term
nucleus
Definition
small dense region within most nuclei in wich the assembaly of ridosomes begin
Term
cytoplasm
Definition
matirial inside the cell membrane- but not including the nucleus
Term
prokaryote
Definition
single celled organisim that lacks a nucleus
Term
eukaryote
Definition
organism whose cells contain nuclei
Term
organelle
Definition
specialized structure that performs important cellular functions within a eukaryote cell
Term
aton van leeuwenhoek
Definition
he observes tiny living organisim in drops of pond water through his simple microscope(1674)
Term
robert hooke
Definition
publishes his book micrographia, wich contains his drawings of sections of cork as seen through one of the first microscopes.(1665)
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