1. CHAPTER 7: CELL STRUCTURE AND FUNCTION
Scanning Electron Microscope: Specimen Cells

2. Fat cells

3. Nerve Cells

4. Red Blood Cells

5. More Cells

6. More Cells!

7. Used compound microscope
7-1 Life Is Cellular
A. The Discovery of the Cell
1. Early Microscopes
Robert Hooke-
Anton van Leeuwenhoek-
2. The Cell Theory
Mathias Schleiden-
Theodor Schwann-
Rudolf Virchow-
Used compound microscope
to look at a slice of cork
Observed tiny living things in pond water
Concluded all plants are made of cells
Stated all animals are made of cells
Concluded new cells come from existing cells

8. Cell Theory:  All living things are composed of _____
 Cells are the basic units of structure and function in living things
 New cells are produced from ____________
cells
Existing cells

9. Exploring the Cell 1. Electron Microscope (TEM & SEM) -Specimen placed in a vacuum Scanning Probe Microscope development of fine probe microscope -operates in _______________ -can even show samples in solution
ordinary air

10. C. Prokaryotes and Eukaryotes
cells vary in size from _________________- ___________________
viruses are not cells
0.2 micrometers
1000 micrometers
Prokaryotic cell
Eukaryotic cell
Cell membrane
Cytoplasm
Cell membrane
Cytoplasm
Organelles
Nucleus

11. Membrane bound organelles
Prokaryotes
Common to Both
Eukaryotes
pro=__________
karyote= kernel (nucleus)
generally smaller
less complicated no
Ex: Kingdom
Monera
- Eubacteria
- Archaea
contain __________
Eu= ___________
Karyote=kernel (nucleus)
Generally larger
Contain membrane bound organelles (“little organs”)
Ex:
before
true
DNA
Cell membrane
Membrane bound organelles
Plants, animals, fungi, and protists

12. Eukaryotic Cell vs. Prokaryotic cell

15. artists rendition of the plant cell
Section 7-2
Nuclear
envelope
Ribosome
(attached)
(free)
Smooth endoplasmic
reticulum
Nucleus
Rough endoplasmic reticulum
Nucleolus
Golgi apparatus
Mitochondrion
Cell wall
Cell
Membrane
Chloroplast
Vacuole
Plant Cell

16. artists rendition of an animal cell

17. Animal Cell (attached) Ribosome Nucleolus (free) Nucleus Cell Membrane
Animal Cell
Centrioles
Nucleolus
Nucleus
Nuclear
envelope
Rough
endoplasmic
reticulum
Golgi apparatus
Smooth
Mitochondrion
Cell
Membrane
Ribosome
(free)
(attached)

18. 7-4 The Diversity of Cellular Life
A. Unicellular Organisms (single celled)
Unicellular organisms _________ multicellular organisms
Examples:
B. Multicellular Organisms (many celled)
Cells become ___________ to perform different tasks
Cells need to communicate and cooperate
outnumber
Yeast, algae, bacteria
specialized

19. C. Levels of Organization
 The levels of organization in a multicellular organism are:
individual
CELLS
TISSUES
ORGANS
ORGAN SYSTEMS

20. 1. Tissues=
Four types of tissue: -
Organs=
Ex. bicep muscle is mad of muscle, connective, and nervous tissue
3. Organ Systems=
Group of similar cells that perform a particular function
muscle
epithelial
nervous
connective
Groups of tissues
Group of organs that work together to perform a specific function.