Types of cells

1. 1° grade
The Cell and
the Cell
Types

2. Cell theory
●Cell is the fundamental
unit of life.
●Living things are made
by one or many cells.
●Cells come from other
cells.

9. ●Cells can specialize and
organize to form complex
organisms.
●Cell -> Tissue -> Organs ->
Systems -> Organisms.
Pluricellular organisms

11. Unicellular organisms
●Organisms formed by
one single cell.
●Bacteria, protozoos,
microscopic fungi.

12. Cell types
●Depending on their size,
characteristics and
complexity, cells can be
divided into:
1) Prokaryotes
2) Eukaryotes

13. Prokaryotes
●Exist since 3,500 million
years ago.
●Only living organisms
during 2,000 million
years.
●THEY DON’T HAVE
NUCLEUS!!!
●THEY DON´T HAVE
ORGANELLES!!!

14. Eukaryotes
●Exist since 1,500 million
years ago.
●THEY HAVE NUCLEUS!!!
●THEY HAVE
ORGANELLES!!!
●They’re bigger than
prokaryotes. Size from 10
to 100 microns.

15. Eukaryotes
●They’re bigger than
prokaryotes. Size from 10
to 100 microns.
●Essentially two types of
eukaryotes.
1) Animal cells
2) Plant cells

16. Where do eukaryotes come from?
●Eukaryotes are
symbiotes!!!
●Increasing oxygen on
ancient Earth’s
atmosphere forced
organisms to cooperate.
●Eukaryotes formed by
endosymbiosis
●Mitochondria and
chloroplasts.