Cell Structure & Function

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Cell Structure & Function. http://koning.ecsu.ctstateu.edu/cell/cell.html. Definition of Cell. A cell is the smallest unit of structure in all living things. Cell Theory. All living things are made of cells . All cells come from preexisting cells through cell division. - PowerPoint PPT Presentation

Transcript of Cell Structure & Function

Cell Structure & Function

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

Definition of CellA cell is the smallest unit of structure in all living things. Cell TheoryAll living things are made of cells. All cells come from preexisting cells through cell division.

Examples of Cells

Amoeba ProteusPlant StemRed Blood Cell

Nerve Cell

BacteriaCell Organization Cell Tissue Organ (heart)

Cell Organization (continued)Organ system Organism(circulatory system) (Human)

Two Types of CellsProkaryoticEukaryoticProkaryotic CellsNo membrane-bound organelles/structuresDo not have a true nucleusOne-celled organisms, Bacteria

http://library.thinkquest.org/C004535/prokaryotic_cells.htmlEukaryotic CellsContain organelles surrounded by membranesHas a nucleusMost living organisms

PlantAnimalhttp://library.thinkquest.org/C004535/eukaryotic_cells.htmlCell PartsAKA OrganellesInside the CellNucleusDirects cell activitiesContains genetic material Chromosomes/DNA

NucleolusInside nucleusContains RNA to build proteins


CytoplasmGel-like mixture in the cellMitochondriaProduces energy through chemical reactions breaking down fats & carbsPowerhouse of the cell


Surrounding the Cell:Cell MembraneAllows movement in and out of the cell


Cell Membrane Cont.Passive Transport:Requires NO energy

Diffusion: substance move through the membraneOsmosis: movement of water from HIGH LOW concentrationActive Transport:Requires energy

Moves from LOW HIGH concentration (thats why it takes energy!)Endoplasmic Reticulum

Moves materials around in cellhttp://library.thinkquest.org/12413/structures.htmlRibosomesMake proteins


VacuolesMembrane-bound sacs for storage, digestion, and waste removal


Surrounding the Cell:Cell WallFound in plant cells/bacteriaShapes, supports & protects cells


ChloroplastFound only in plant cells*Green Chlorophyll=Makes plant food/ photosynthesis


Golgi BodiesMoves Protein within/out of the cell


LysosomeFound mainly in animal cellsDigestive functions for proteins, fats, and carbohydrates


Typical Animal Cell

http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gifhttp://waynesword.palomar.edu/images/plant3.gifTypical Plant Cell

Cellular Raphttp://www.youtube.com/watch?v=-zafJKbMPA8