Cells- The Basic Unit of Life
Presented By:
Mrs. Nelson
Cell Theory
 All living things are made of cells.
Unicellular: single cell
ex) bacteria, protists
Multicellular: many cel...
Prokaryotic vs. Eukaryotic
 Small
 No membrane
bound organelles
 No nucleus
 Non-specialized
 Independent
 Large
 M...
 Explains the origin of eukaryotic cells.
 What is the main difference between
prokaryotic and eukaryotic?
 Simple  Co...
Controls what enters and exits
cell
Semi-permeable
Also known as phospholipid
bilayer
phosphorus
lipid
hydrophylic
hydrophobic
Cell Membrane Structure
markerReceptor
Channel
 Allows cells to talk to one another
 Important for multicellular organisms
 Cells send “messages” to one another
 Mes...
Gives your cells “identity” = id card
Distinguishes your cells from other
cells
Immune system
Allows molecules to pass through
the membrane
The Cell Factory
 The cell is like factory…
 Factories produce
something…
 Cells produce
proteins…
 Different cells pr...
Cell Membrane
Door to the
factory.
Controls what
enters/exits the
cell.
Cytoplasm
Jellylike substance where the
organelles found…
The Nucleus
 “Control Center” –
in charge of all the
cells activities
 Contains the DNA or
chromosomes
 DNA is instruct...
Mitochondria
“Generator of the
cell”
Supplies cell with
energy
Change food energy
into energy cell can
use (ATP- gasoli...
Chloroplast
 “Power Station”
 Found only
autotrophic organisms
 Contain pigment
chlorophyll
 Trap sunlight convert
it ...
Ribosomes
 “Assembly line workers”
 Proteins built
Endoplasmic
Reticulum
 “Highway” system
 Materials can
travel on it
throughout the cell
 Rough ER vs.
Smooth ER
Golgi
Apparatus
 “Packaging Center”
 Collects, modifies,
packages proteins
and other molecules
made in the cell
Lysosomes
“Recycling Center”
Engulfs damaged
cell parts
Centrioles
“Reproductive
Structures” –
organize cell
division.
Always in pairs and
found only in
animals cells.
Vacuoles
“Storage Areas”
Store materials
such as: water,
wastes, and
nutrients
Animal Cell
Plant Cells
Contrast
 Plant Cells
 Cell wall and
cell membrane
 chloroplast and
mitochondria
 LARGE Central
vacuole
 NO- centriol...
Human Cheek Cell (Animal cell)
Elodea Cell (Plant Cell)
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Cell presentation

  1. 1. Cells- The Basic Unit of Life Presented By: Mrs. Nelson
  2. 2. Cell Theory  All living things are made of cells. Unicellular: single cell ex) bacteria, protists Multicellular: many cells ex) animals and plants  Cells are the smallest working units of living things.  All cells come from pre-existing cells.
  3. 3. Prokaryotic vs. Eukaryotic  Small  No membrane bound organelles  No nucleus  Non-specialized  Independent  Large  Membrane bound organelles  Nucleus  Specialized  Dependent
  4. 4.  Explains the origin of eukaryotic cells.  What is the main difference between prokaryotic and eukaryotic?  Simple  Complex (prokaryotic  eukaryotic)  Chloroplast/Mitochondria have own DNA  Scientists suggest that this means these organelles were once lived independently outside of cells
  5. 5. Controls what enters and exits cell Semi-permeable Also known as phospholipid bilayer
  6. 6. phosphorus lipid hydrophylic hydrophobic
  7. 7. Cell Membrane Structure markerReceptor Channel
  8. 8.  Allows cells to talk to one another  Important for multicellular organisms  Cells send “messages” to one another  Messages = hormones Ex.) Histamine
  9. 9. Gives your cells “identity” = id card Distinguishes your cells from other cells Immune system
  10. 10. Allows molecules to pass through the membrane
  11. 11. The Cell Factory  The cell is like factory…  Factories produce something…  Cells produce proteins…  Different cells produce different proteins…  People / machines perform functions in a factory.  “Organelles” in cell work together to make the protein.
  12. 12. Cell Membrane Door to the factory. Controls what enters/exits the cell.
  13. 13. Cytoplasm Jellylike substance where the organelles found…
  14. 14. The Nucleus  “Control Center” – in charge of all the cells activities  Contains the DNA or chromosomes  DNA is instructions for cell to build proteins  Nucleolus- makes ribosomes
  15. 15. Mitochondria “Generator of the cell” Supplies cell with energy Change food energy into energy cell can use (ATP- gasoline)
  16. 16. Chloroplast  “Power Station”  Found only autotrophic organisms  Contain pigment chlorophyll  Trap sunlight convert it into energy
  17. 17. Ribosomes  “Assembly line workers”  Proteins built
  18. 18. Endoplasmic Reticulum  “Highway” system  Materials can travel on it throughout the cell  Rough ER vs. Smooth ER
  19. 19. Golgi Apparatus  “Packaging Center”  Collects, modifies, packages proteins and other molecules made in the cell
  20. 20. Lysosomes “Recycling Center” Engulfs damaged cell parts
  21. 21. Centrioles “Reproductive Structures” – organize cell division. Always in pairs and found only in animals cells.
  22. 22. Vacuoles “Storage Areas” Store materials such as: water, wastes, and nutrients
  23. 23. Animal Cell
  24. 24. Plant Cells
  25. 25. Contrast  Plant Cells  Cell wall and cell membrane  chloroplast and mitochondria  LARGE Central vacuole  NO- centrioles  “square” shape  Animal Cells  cell membrane ONLY  mitochondria  two more small vacuoles  centrioles  “round” shape
  26. 26. Human Cheek Cell (Animal cell)
  27. 27. Elodea Cell (Plant Cell)

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