2. The Cell Theory
1. All organisms are made of cells.
2. The cell is the basic unit of life in all living
things.
3. All cells come from the division of pre-
existing cells.
THIS IS IMPORTANT BECAUSE IT SHOWS THAT
ALL LIVING THINGS SHARE A SIMILAR
STRUCTURE
Theodore Schwann
Rudolf Virchow
3. Two Types of Cells
All cells, whether they are prokaryotic or eukaryotic, have some
common features
4. Number of Cells
copyright cmassengale 4
Organisms may be:
• Unicellular –
composed of one cell
• Multicellular-
composed of many
cells that may
organize
5. copyright cmassengale 5
Cells May be Prokaryotic or Eukaryotic
Prokaryotes include bacteria & lack
a nucleus or membrane-bound
structures called organelles
Eukaryotes include most other cells
& have a nucleus and membrane-
bound organelles (plants, fungi, &
animals)
14. • Transportation system of
cell
• Rough ER- play a role in
protein-synthesis; has
attached ribosomes
• Smooth ER- play a role in
phospholipid-synthesis; no
attached ribosomes
Ribosomes
Endoplasmic Reticulum
Endoplasmic Reticulum
Roads/Pathway
15. • Packaging house of cell
• Packages, processes, and
ships out the stuff the
cell makes
Golgi Complex
J&T Courier
16. Digests food particles
and cell parts; breaks
down wastes
Lysosome
Garbage Collector Police Officer
Protects cell by digesting
foreign invaders
17. • Stores water, food & wastes
Vacuole is largest
organelle in plant
cell
Vacuole
Food and Water
Containers
18. Cell Wall
• Found only in plant cells
• Protects and supports the cell
Cell Wall
Wall
19. • Found only in plant cells
• Contains chlorophyll (makes
plants green)
• Where photosynthesis
takes place
Chloroplasts
20.
21. Plant Cell and Animal Cell
:
• Chloroplasts
• Cell Wall
Animal Cell
Found in Both Plant
and Animal Cell
Plant Cell
Centriole Nucleus
Golgi Complex
Mitochondrion
Lysosomes
Endoplasmic
Reticulum
Cell Membrane
Ribosomes
Vacuoles
Cell Wall
Chloroplast
Vacuole
22. Similarities between plant
cells and animal cells
Both have a cell membrane surrounding the
cytoplasm
Both have a nucleus
Both contain mitochondria
23. Differences between plant
cells and animal cells
Animal cells Plant cells
Relatively
smaller in size
Irregular shape
No cell wall
Relatively
larger in size
Regular shape
Cell wall is present
24. Vacuole small or
absent
Glycogen as food
storage
Nucleus at the
center
Large central
vacuole
Starch as food
storage
Nucleus near cell
wall
Differences between plant
cells and animal cells
Animal cells Plant cells