The Living Cell
Cell Theory
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Cells are the smallest living things
Cells arise from previously
existing cells
All organisms are composed
of one of more cells
Life arose once long ago
Cell Types
Prokaryotic cells -- do not have
organelles or a nucleus
Eukaryotic cells -- have many
membrane bounded compartments,
organelles and a nucleus
The
Eukaryotic
Cell
Cell Structure
Cell Functions
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Importing food
Processing food into energy and other
chemical compounds
Exporting products for bodily requirements
and functions
Reproducing itself
Transmitting DNA information
Recycling waste material
Cell Organelles
Membrane
Cytoplasm
Nucleus
Endoplasmic
Reticulum
Ribosomes
Mitochondria
Golgi Bodies
Organelle Functions
Endoplasmic Reticulum -- provides a large
surface area for chemical reaction catalysis
Golgi Apparatus – site of synthesis and
packaging of certain molecules produced
Lysosomes – “cleans up’ cell waste and
destroys cellular materials for recycle
Mitochondrion – process nutrients into energy
for cell to use.
Ribosomes – synthesize proteins
Visibility Scale
Stem
Cells