Cell Structure and Function

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Cell Structure and Function
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A history of the cell

• Robert Hooke - uses the word cells to describe
  cork.
• Anton van Leeuwenhoek - observes tiny
  microorganisms with his microscope.

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A history of the cell

• Matthias Schleiden - all plants are made of
  cells
• Theodor Schwann - all animals are made of cells

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A history of the cell

• Rudolf Virchow - Cell Theory
• All living things are composed of cells.
• Cells are the basic unit of structure and
  function in living things.
• New cells come from preexisting cells.

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Basic cell structures

• All cells have a cell membrane
• All cells are filled with cytoplasm
• All cells have some sort of genetic material

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Prokaryotes vs. Eukaryotes

• Prokaryotes using Latin PS prokaryote means
  before nucleus

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Prokaryotes vs. Eukaryotes

• Prokaryotes
• Do NOT have Nucleus or organelles
• Generally smaller and simpler
• All bacteria are prokaryotes

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Prokaryotes vs. Eukaryotes

• Eukaryotes using Latin PS eukaryote means true
  nucleus

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Prokaryotes vs. Eukaryotes

• HAVE nuclei
• Also have dozens of other specialized structures
  called ORGANELLES
• Can be found in single-celled organisms or
  multi-celled organisms
• All plants, animals and fungi are eukaryotes

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Eukaryotes
Prokaryotes
-Has nucleus -Plants, animals and fungus

• No nucleus
• Bacteria

-Cell membrane -Cytoplasm -DNA