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Cell Structure

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Title: Cell Structure & Function Author: Mary Poarch Last modified by: annac.ward Created Date: 4/25/2003 2:38:52 AM Document presentation format – PowerPoint PPT presentation

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Title: Cell Structure


1
Cell Structure Function
http//koning.ecsu.ctstateu.edu/cell/cell.html
2
DO NOW!!! (page 10)
3
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.

4
Definition of Cell
  • A cell is the smallest unit that is capable of
    performing life functions.

5
Examples of Cells
Amoeba Proteus
Plant Stem
Bacteria
Red Blood Cell
Nerve Cell
6
Two Types of Cells
  • Prokaryotic
  • Eukaryotic

7
Prokaryotic
  • Do not have structures surrounded by membranes
  • Few internal structures
  • One-celled organisms, Bacteria

http//library.thinkquest.org/C004535/prokaryotic_
cells.html
8
Eukaryotic
  • Contain organelles surrounded by membranes
  • Most living organisms

Plant
Animal
http//library.thinkquest.org/C004535/eukaryotic_c
ells.html
9
Typical Animal Cell
http//web.jjay.cuny.edu/acarpi/NSC/images/cell.g
if
10
Typical Plant Cell
http//waynesword.palomar.edu/images/plant3.gif
11
Cell Parts
  • Organelles

12
Cell Membrane
  • Outer membrane of cell that controls movement in
    and out of the cell
  • Double layer

http//library.thinkquest.org/12413/structures.htm
l
13
Cell Wall
  • Most commonly found in plant cells bacteria
  • Supports protects PLANT cells

http//library.thinkquest.org/12413/structures.htm
l
14
Inside the Cell
15
Nucleus
  • Directs cell activities
  • Separated from cytoplasm by nuclear membrane
  • Contains genetic material - DNA

16
Nuclear Membrane
  • Surrounds nucleus
  • Made of two layers
  • Openings allow material to enter and leave
    nucleus

http//library.thinkquest.org/12413/structures.htm
l
17
Cytoplasm
  • Gel-like mixture inside the cell
  • Surrounded by cell membrane

18
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.htm
l
19
Vacuoles
  • Membrane-bound sacs for storage, digestion, and
    waste removal
  • Contains water solution
  • Help plants maintain shape

http//library.thinkquest.org/12413/structures.htm
l
20
Chloroplast
  • Usually found in plant cells
  • Contains green chlorophyll
  • Where photosynthesis takes place

http//library.thinkquest.org/12413/structures.htm
l
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