Cell structure function

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  • 1. Cell Structure & Functionhttp://koning.ecsu.ctstateu.edu/cell/cell.html

2. Cell Theory All living things are made up of cells. Cells are the smallest working units of allliving things. All cells come from preexisting cellsthrough cell division. 3. Definition of CellA cell is the smallest unit that is capable of performing lifefunctions. 4. Examples of Cells Amoeba ProteusPlant StemBacteria Red Blood Cell Nerve Cell 5. Two Types of CellsProkaryoticEukaryotic 6. Prokaryotic Do not have structures surrounded by membranes Few internal structures One-celled organisms, Bacteriahttp://library.thinkquest.org/C004535/prokaryotic_cells.html 7. Eukaryotic Contain organelles surrounded by membranes Most living organisms PlantAnimalhttp://library.thinkquest.org/C004535/eukaryotic_cells.html 8. Typical Animal Cellhttp://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif 9. Typical Plant Cellhttp://waynesword.palomar.edu/images/plant3.gif 10. Cell PartsOrganelles 11. Surrounding the Cell 12. Cell Membrane Outer membrane of cellthat controls movementin and out of the cell Double layerhttp://library.thinkquest.org/12413/structures.html 13. Cell Wall Most commonly foundin plant cells &bacteria Supports & protectscellshttp://library.thinkquest.org/12413/structures.html 14. Inside the Cell 15. Nucleus Directs cell activities Separated from cytoplasm by nuclearmembrane Contains genetic material - DNA 16. Nuclear Membrane Surrounds nucleus Made of two layers Openings allow material to enter and leave nucleushttp://library.thinkquest.org/12413/structures.html 17. Chromosomes In nucleus Made of DNA Contain instructionsfor traits &characteristicshttp://library.thinkquest.org/12413/structures.html 18. Nucleolus Inside nucleus Contains RNA to build proteinshttp://library.thinkquest.org/12413/structures.html 19. Cytoplasm Gel-like mixture Surrounded by cell membrane Contains hereditary material 20. Endoplasmic Reticulum Moves materials aroundin cell Smooth type: lacksribosomes Rough type (pictured):ribosomes embedded insurfacehttp://library.thinkquest.org/12413/structures.html 21. Ribosomes Each cell contains thousands Make proteins Found on ribosomes & floating throughout the cellhttp://library.thinkquest.org/12413/structures.html 22. Mitochondria Produces energy throughchemical reactions breaking down fats &carbohydrates Controls level of water andother materials in cell Recycles and decomposesproteins, fats, andcarbohydrateshttp://library.thinkquest.org/12413/structures.html 23. Golgi Bodies Protein packaging plant Move materials within the cell Move materials out of the cellhttp://library.thinkquest.org/12413/structures.html 24. Lysosome Digestive plant forproteins, fats, andcarbohydrates Transports undigestedmaterial to cellmembrane for removal Cell breaks down iflysosome explodeshttp://library.thinkquest.org/12413/structures.html 25. Vacuoles Membrane-boundsacs for storage,digestion, and wasteremoval Contains watersolution Help plants maintainshapehttp://library.thinkquest.org/12413/structures.html 26. Chloroplast Usually found in plantcells Contains greenchlorophyll Wherephotosynthesis takesplacehttp://library.thinkquest.org/12413/structures.html