Transcript All living things are composed of cells…… CHAPTER 4

All living things
are composed of
cells……
CHAPTER 4
THE STRUCTURE AND
FUNCTION
OF THE CELL
LEEUWENHOEK
1600s
simple microscope
animalcules in pond
water
1665
Plant stem
Cork
“Cell”
HOOKE
BROWN
1828
Nucleus
SCHWANN
1839
Animals are made of cells
SCHLEIDEN
1839
Nucleus is involved in cell reproduction
VIRCHOW
1855
Cells divide
OTHER MICROSCOPES
TEM – TRANSMISSION
ELECTRON
- thin
- 200,000 times
SEM – SCANNING
ELECTRON
- surface
- 3-D
- 100,000 times
Cell Theory
1. Basic unit of life = cells
2. All living things are made of cells
3. Cells come from pre-existing cells
CELL SHAPES
CELL SIZE
http://www.cellsalive.com/howbig.htm
Cells are normally measured in micrometers.
Millimeters are often used for teaching purposes
PROKARYOTIC CELL VS.
EUKARYOTIC CELL
Plant Cell
Animal Cell
CELL MEMBRANE
FLUID MOSAIC MODEL OF THE CELL
MEMBRANE
 Peripheral
 Integral
 Transport proteins
 Receptor proteins
 Recognition proteins
PROTEINS
CENTRIOLES
RESPIRATION
PLASTIDS
Contain a double membrane and their own DNA
Examples: amyloplast, chloroplast,chromoplast
PHOTOSYNTHESIS
CHLOROPLAST
Why leaves turn colors in the fall
STOMATA
What is cilia?
What is flagella?