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Cell Structure & Function

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Presentation on theme: "Cell Structure & Function"— Presentation transcript:

1 Cell Structure & Function http://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 all living things. All cells come from preexisting cells through cell division.

3 Definition of Cell A cell is the smallest unit that is capable of performing life functions.

4 Examples of Cells Amoeba Proteus Plant Stem Red Blood Cell Nerve Cell Bacteria

5 Two Types of Cells Prokaryotic Eukaryotic

6 Prokaryotic Do not have structures surrounded by membranes Few internal structures One-celled organisms, Bacteria http://library.thinkquest.org/C004535/prokaryotic_cells.html

7 Eukaryotic Contain organelles surrounded by membranes Most living organisms PlantAnimal http://library.thinkquest.org/C004535/eukaryotic_cells.html

8 “Typical” Animal Cell http://web.jjay.cuny.edu /~ acarpi/NSC/images/cell.gif

9 http://waynesword.palomar.edu/images/plant3.gif “Typical” Plant Cell

10 Cell Parts Organelles

11 Surrounding the Cell

12 Cell Membrane Outer membrane of cell that controls movement in and out of the cell Double layer http://library.thinkquest.org/12413/structures.html

13 Cell Wall Most commonly found in plant cells & bacteria Supports & protects cells http://library.thinkquest.org/12413/structures.html

14 Inside the Cell

15 Cytoplasm Gel-like mixture Surrounded by cell membrane Contains hereditary material

16 Nucleus Directs cell activities Separated from cytoplasm by nuclear membrane Contains genetic material - DNA

17 Nuclear Membrane Surrounds nucleus Made of two layers Openings allow material to enter and leave nucleus http://library.thinkquest.org/12413/structures.html

18 Endoplasmic Reticulum Moves materials around in cell Smooth type: lacks ribosomes Rough type (pictured): ribosomes embedded in surface http://library.thinkquest.org/12413/structures.html

19 Mitochondria Produces energy through chemical reactions – breaking down fats & carbohydrates Controls level of water and other materials in cell Recycles and decomposes proteins, fats, and carbohydrates http://library.thinkquest.org/12413/structures.html

20 Chromosomes In nucleus Made of DNA Contain instructions for traits & characteristics http://library.thinkquest.org/12413/structures.html

21 Nucleolus Inside nucleus Contains RNA to build proteins http://library.thinkquest.org/12413/structures.html

22 Ribosomes Each cell contains thousands Make proteins Found on ribosomes & floating throughout the cell http://library.thinkquest.org/12413/structures.html

23 Golgi Bodies Protein 'packaging plant' Move materials within the cell Move materials out of the cell http://library.thinkquest.org/12413/structures.html

24 Lysosome Digestive 'plant' for proteins, fats, and carbohydrates Transports undigested material to cell membrane for removal Cell breaks down if lysosome explodes http://library.thinkquest.org/12413/structures.html

25 Vacuoles Membrane-bound sacs for storage, digestion, and waste removal Contains water solution Help plants maintain shape http://library.thinkquest.org/12413/structures.html

26 Chloroplast Usually found in plant cells Contains green chlorophyll Where photosynthesis takes place http://library.thinkquest.org/12413/structures.html

27 Cell Amusement Park Project

28 Amusement Park Ideas  the cell wall could be the amusement park wall/boundaries  the ribosomes (small round bodies) could be a teacup ride  the nucleus: the information station/guest services (as DNA kind of is)  mitochondria (makes atp/energy) could be the food station/restaurant  vacuole could be a water ride  cytoplasm would be the grounds/landscape of the amusement park since the rides are in the park and the cytoplasm holds cell contents  the golgi apparatus could be a roller coaster since it is so big and windy  endoplasmic reticulum as a train ride (because it is used in transportation)

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