LEVELS OF ORGANIZATION OF LIVING THINGS

1. Lesson 2
LEVELS OF
ORGANIZATION IN
ANIMAL

2. LEVELS OF ORGANIZATION IN
ANIMAL COMPLEXITY

3. 2.2.Cells:
The Basic Units
of Life

4. CELL

5. 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 existing
cells.
THIS IS IMPORTANT BECAUSE IT SHOWS
THAT ALL LIVING THINGS SHARE A SIMILAR
STRUCTURE

6. Two Types of
Cells
All cells, whether they are prokaryotic or eukaryotic, have
some common features

7. BACTERIAL CELL

8. Organelles
 Organelles are structures that enable
the cell to live, grow and reproduce.

9. Two Types of
Cells
1. Prokaryotic Cells:
Have no membrane
covered nucleus
Have no membrane -
covered organelles
Have circular DNA
Are bacteria

10. Two Types of
Cells
2. Eukaryotic Cells:
Have a nucleus
Have a membrane -
covered organelles
Have linear DNA
Are all other cells

11. Organelles
 Organelles are structures that enable the cell to
live, grow and reproduce.

12. 1. Cell
Membrane
• Outer layer of cell
• Allows nutrients into the cell
and wastes outside of the cell
CELL MEMBRANE
“GATE INTO THE CITY”

13. 2.
Cytoplas
m
• Cytoplasm a jelly-like fluid contained in the
cell that holds the organelles.

14. 2.
Cytoplas
m
• Cytoplasm a jelly-like fluid contained in the
cell that holds the organelles.

15. 3. The Nucleus
The control
center of the cell
Contains the
Cell’s DNA
DNA
Nuclear Membrane
Nucleolus
“Mayor’soffice”

16. 4.
Mitochondria
Power center of cell
Provides the energy
the cell needs to
move, divide, etc.
Outer Membrane
Inner Membrane
“ELECTRIC COMPANY OF THE CELL”

17. 5. Ribosomes
• Site where
proteins are
made
• Cell parts are
made of proteins
“FACTORIES OF THE CELL”

18. 6. Endoplasmic
Reticulum  Transportation
system of cell
 Rough ER-
ribosome's
attached
 Smooth ER- no
ribosome's
Ribosomes
Endoplasmic Reticulum
“ROADWAYS OF THE CELL”

19. 7. Golgi
Complex
Packaging house
of cell
Packages,
processes, and
ships out the
stuff the cell
makes
“UPS OF THE
CELL”

20. 8. Lysosomes
Digests food particles
and cell parts
“GARBAGE MEN”
Protects cell by
digesting foreign
invaders
“POLICE MEN

21. 9.
Centrosome
a cellular structure involved in
the process of cell division.

22. 10. Vacuole
Stores water, food &
wastes
Vacuole
Vacuole is largest
organelle in plant cell

23. 11. Cell Wall
 Found only in plant cells
 Protects and supports the cell

24. 12.
Chloroplast
s
 Found only in plant
cells
 Contains
chlorophyll (makes
plants green)
 Where
photosynthesis
takes place

25. 12.
Cytoskeleton
 organizes other constituents of the cell
 maintains the cell's shape
 responsible for the locomotion of the cell itself and
the movement of the various organelles within it

26. Plant or Animal
Cell?
Found in Plant and Animal cells: Found only in Plant Cells:
• Nucleus
• Golgi Complex
• Mitochondrion
• Lysosomes
• Endoplasmic
Reticulum
• Cell Membrane
• Ribosomes
• Vacuoles

27. 2.2. ANIMAL TISSUE

29. 2.3. ORGAN AND ORGAN SYSTEM