Transcript Cells Section 1 – Cell Structure

Cells
Section 1 – Cell Structure
A.
Common cell structures – outer covering called cell
membrane and internal gelatin like cytoplasm.
A.
B.
Comparing cells – size and shape relate to function
Two cell types
A.
Prokaryotic cells lack membrane – bound internal structures
A.
B.
Only found in one-celled organisms such as bacteria
Eukaryotic cells contain membrane – bound internal structures.
Cell organization
B.
Cell organization
A. Composes of cellulose, a cell wall grows, gives
shape to, and protects the cells of plants, algae,
fungi, and most bacteria.
B. Cell membrane – protective layer around the cells
A. For cells with cell walls, the cell membrane is
inside the cell wall.
B. A cell membrane allows food and oxygen into
the cell and waste products out of the cell
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Cytoplasm – gelatin like substance inside cell
membrane
Cytoskeleton – scaffolding – like structure in
cytoplasm which helps cell keep its shape
 In the cytoplasm, eukaryotic cells have organelles
which help cell life processes.
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Nucleus – contains instructions for everything cell
does; includes DNA