1. THE ORGANIZATION
OF LIVING THINGS

2. BENEFITS OF BEING MULTICELLULAR
• Larger Size: larger organisms are prey for
fewer predators. Also, large predators can
eat a wider variety of prey
• Longer Life: not limited to the life span of
any single cell
• Specialization: each type of cell has a
particular job. This makes the organism more
efficient!

3. EXAMPLE:
Cardiac Muscle Cell

4. • Level 1: Cell
• -smallest unit that
can perform life
processes
independently
• -vary in size and
shape
• -Example: plant
cell (square) and
animal cell
(round)

5. LEVEL 2: TISSUE
CELLS WORKING TOGETHER
• Tissue: a group of cells that work together
to perform a specific job
Animals have 4 basic types of tissues:
1. nerve tissue

6. 2. muscle tissue
3. connective tissue

7. 4. Protective
Tissue
Example:
Adipose (fat)
cells in the
skin

8. PLANT TISSUES
• Plants have 3 types
of tissue:
1. transport
tissue
2. protective
tissue (dermal)
3. ground tissue

9. LEVEL 3: ORGAN
TISSUES WORKING TOGETHER
• Organ = a collection of tissues that
carry out a specialized function of the
body
• Example: heart
- has mostly cardiac tissue, but also
has nerve tissue and tissues of the
blood vessels that all work together
• Other examples: stomach, intestines,
brain, and lungs

10. • Examples in plants: the
leaf plant organ that
contains tissue that
traps light energy to
make food
• Also: stems and roots

11. IS THAT A FACT?!
In your lifetime, your body will shed
about 40 pounds of dead skin!

12. LEVEL 4: ORGAN SYSTEM
ORGANS WORKING TOGETHER
• Organ system =
group of organs
that work together
to perform body
functions
• Examples: digestive
system, which
includes several
organs, such as the
stomach and
intestines

13. ON ITS OWN: ORGANISM
• Organism = a living thing; anything
that can carry out life processes
independently
• An organism can be unicellular, like
this bacteria:

14. • OR an organism can be
multicellular, like you!

15. STRUCTURE & FUNCTION
• In organisms, structure and function are
related.
Structure = arrangement of parts in an
organization
-Includes the shape of a part and the
material of which the part is made
Function = the job that the part does

16. EXAMPLE OF STRUCTURE AND
FUNCTION:
The structure of the
lungs is a large,
spongy sac. Blood
vessels wrap around
aveoli (air sacs). The
structure of the
aveoli and blood
vessels enable them
to perform a
function, which is
bring oxygen into
the body and take
out carbon dioxide.

18. VIDEO CLIP: ORGANIZATION OF
LIVING THINGS
• click here for video