cells the basis of life l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Cells: The Basis of Life PowerPoint Presentation
Download Presentation
Cells: The Basis of Life

Loading in 2 Seconds...

play fullscreen
1 / 14

Cells: The Basis of Life - PowerPoint PPT Presentation


  • 255 Views
  • Uploaded on

Cells: The Basis of Life. Mevan Siriwardane Mrs. Rolle’s Biology - Barringer High School October 25, 2007. Background. Microscopes Magnifies objects of small size Series of lens refracts a beam of light passing through an object

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Cells: The Basis of Life


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
cells the basis of life

Cells: The Basis of Life

Mevan Siriwardane

Mrs. Rolle’s Biology - Barringer High School

October 25, 2007

background
Background
  • Microscopes
    • Magnifies objects of small size
      • Series of lens refracts a beam of light passing through an object
      • Light reflect of the object is focused to the eye to see a larger image
discovery of a cell
Discovery of a Cell
  • Earliest Microscopes
    • Compound light microscope, mid-1600s
    • Observations led to discoveries
      • Hooke’s study of cork through microscope (1665)
      • Leeuwenhoek saw living things in pond water (1674)
development of the cell theory
Development of the Cell Theory
  • (Early 1600’s) - Invention of the first microscope
  • 1665 - Robert Hooke’s observation of cork under compound microscope
  • 1674 - Anton van Leeuwenhoek discovers tiny living things in

pond water

  • 1838 - Matthias Schleiden states all plants are made of cells
  • 1839 - Theodor Schwann concludes all animals made up of cells
  • 1855 - Rudolph Virchow says that all cells come from existing cells
cell theory
Cell Theory
  • Observations and conclusions by many scientists led to understanding of the cell
  • Cell Theory:
    • 1) All livings things are made of cells
    • 2) Cells are basic units of structure/function in living things
    • 3) New cells are produced from existing cells
modern microscopes
Modern Microscopes
  • Types
    • Light microscope (400-1000X)
    • Confocal/Fluorescence microscope (500X)
    • Electron microscope (1000-10000X)
basics of the cell
Basics of the Cell
  • Separated from outside world
    • Cell membrane
  • Stores DNA for biological information
    • DNA stored in nucleus depending of type of cell
types of cells
Types of Cells
  • Prokaryotes
    • Very ancient
    • Very small and simple
      • Bacteria
    • No nucleus
  • Eukaryotes
    • Larger and more complex
    • Organized structures
    • Contains a nucleus
what is the nucleus
What is the Nucleus?
  • Control center
    • Contains DNA -> Coded set of instructions
      • Instructions for making molecules like proteins
cell structure and function
Cell Structure and Function

Nucleus

Cytoplasm

  • Eukaryotic Cell (Animal Cell)
    • Divided into two parts: nucleus and cytoplasm
    • Contains many functional “little organs” or organelles

7. Cytoskeleton

8. Smooth ER

Mitochondria

Vacuole

Cytoplasm

Lysosome

Nucleolus

Nucleus

Ribosome

Vesicle

Rough ER

Golgi Apparatus

cell structure and function12
Cell Structure and Function
  • Eukaryotic Cell (Plant)
review
Review
  • http://www.wiley.com/legacy/college/boyer/0470003790/animations/cell_structure/cell_structure.htm