The Living Cell. Cell Theory Cells are the smallest living things Cells are the smallest living things Cells arise from previously Cells arise from previously.

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Presentation transcript:

The Living Cell

Cell Theory Cells are the smallest living things Cells are the smallest living things Cells arise from previously Cells arise from previously existing cells existing cells All organisms are composed All organisms are composed of one of more cells of one of more cells Life arose once long ago Life arose once long ago

Cell Types Prokaryotic cells -- do not have organelles or a nucleus organelles or a nucleus Eukaryotic cells -- have many membrane bounded compartments, organelles and a nucleus membrane bounded compartments, organelles and a nucleus

The Eukary- otic Cell

Cell Structure

Cell Functions Importing food Importing food Processing food into energy and other Processing food into energy and other chemical compounds chemical compounds Exporting products for bodily requirements Exporting products for bodily requirements and functions and functions Reproducing itself Reproducing itself Transmitting DNA information Transmitting DNA information Recycling waste material Recycling waste material

Cell Organelles Membrane Cytoplasm Cytoplasm Nucleus Nucleus Endoplasmic Endoplasmic Reticulum Reticulum Ribosomes Ribosomes Mitochondria Mitochondria Golgi Bodies Golgi Bodies Lysosomes Lysosomes

Organelle Functions Endoplasmic Reticulum -- provides a large surface area for chemical reaction catalysis 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

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Stem Cells