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Chapter 7 Cell Structures and Functions

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Chapter 7 Cell Structures and Functions Section 7-1 Life Is Cellular The Cell Theory Anton van Leeuwenhoek Late 1600 s First Microscope First Time Microscopic ... – PowerPoint PPT presentation

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Title: Chapter 7 Cell Structures and Functions


1
Chapter 7Cell Structures and Functions
  • Section 7-1
  • Life Is Cellular

2
The Cell Theory
  • Anton van Leeuwenhoek
  • Late 1600s
  • First Microscope
  • First Time Microscopic Organisms Observed

3
The Cell Theory
  • Robert Hooke
  • 1665
  • Microscopic View of Cork
  • Started Scientists Searching for Cells

4
The Cell Theory
  • 1838 Matthias Schleiden
  • Plants made of cells
  • 1839 Theodor Schwann
  • Animals made of cells
  • 1855 Rudolph Virchow
  • Cells come from existing cells
  • Completes Cell Theory

5
The Cell Theory
  • Key Concept
  • Cell Theory
  • All living things are composed of cells
  • Cells are the basic units of structure and
    function
  • New cells are produced from existing cells

6
Basic Cell Structures
  • Cells are typically between 5-50 micrometers
  • Can be seen with light microscopes
  • All have a Cell Membrane Cytoplasm

7
Basic Cell Structures
  • Common Cell Structures
  • Cell Membrane
  • Thin, flexible, lipid bilayer
  • Cell Wall
  • Around some cells
  • Strong Rigid

8
Basic Cell Structures
  • Common Cell Structures
  • Nucleus (if present)
  • Contains cells genetic material
  • Controls the cells activities
  • Cytoplasm
  • Matrix between nucleus and cell membrane

9
Prokaryotes Eukaryotes
  • Key Concept
  • Biologists divide cells into two categories
    Eukaryotes Prokaryotes. The cells of Eukaryotes
    have a nucleus, the cells of Prokaryotes do not.

10
Prokaryotes
11
Prokaryotes
  • Usually smaller and simpler
  • Do have Cell Membranes and Cytoplasm
  • Do NOT have Nuclei
  • Includes ALL Bacteria

12
Eukaryotes
13
Eukaryotes
  • Do contain
  • Nuclei, Cell Membrane Cytoplasm Organelles
  • Some are single celled organisms
  • Most make up large, multicellular organisms
  • Includes ALL plants, animals fungi
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