Do Now:List some processes that every living
organism must do in order to survive
r
o
w
t
h
u
t
r
i
t
i
o
n
e
p
r
o
d
u
c
t
i
o
n
e
g
u
l
a
t
i
o
n
e
s
p
i
r
a
t
i
o
n
x
c
r
e
t
i
o
n
y
n
t
h
e
s
i
s
r
a
n
s
p
o
r
t

Process by which organisms increase in
size and/or number of cells.
◦ One cell organism: Increases in the
size of a single cell
◦ Multicellular organism: Increases in
size and number of cells,
accompanied by specialization or
differentiation


How an organism takes in nutrients from
its environment and changes them into
usable forms. These nutrients are used
for growth, repair, energy, and
maintenance.
2 types of nutrition:
1. Autotroph
2. Heterotroph
1.
Autotrophic: CAN make its own food
◦ By photosynthesis
◦
2.
Water + Carbon Dioxide + light energy  Glucose + Oxygen
Heterotrophic: CANNOT make their own
food.
◦ They must find it in their environment.
◦ Processes involved:
1. Ingestion: taking in food
2. Digestion: breaking down food
3. Egestion: elimination of indigestible food

Cellular respiration: the release of stored
chemical energy from food (nutrients).
Energy produced is used for life
processes.
◦
2 types:
1. Aerobic respiration requires oxygen
(O2)
2. Anaerobic respiration does NOT
require O2


How an organism maintains a stable
internal environment as the external
environment constantly changes. Involves
the coordination of various activities of an
organism.
2 systems are involved:
1. Nervous system: carries electric impulses
(messages) throughout the body by
nerves
2. Endocrine system: carries liquid
hormones (messages) through the
blood.



When an organism produces organisms
of its own kind.
**Necessary for survival of the species,
NOT the individual**
2 types:
1. Asexual: only requires 1 parent.
Offspring identical to parent
2. Sexual: requires 2 parents. Offspring
not identical to either parent. Results
in variation (key ingredient for
evolution)


Removal of metabolic waste products
produced by an organism.
If wastes accumulate, it can be harmful.
◦ “Building” or “to make bigger”
◦ Combining simple substances
chemically to form a more complex
substance
◦ This allows the organisms to replace or
repair worn out parts and grow


Delivery system
Involves absorption (taking in) and
__________________(circulation ) of nutrients.
◦ Simple organisms: materials enter the
cell(s) directly from their environment
◦ Multicellular organisms: a circulatory
system is needed. It transports materials
to, and wastes away from the cells of the
organisms.
 Example: blood
METABOLISM:
The sum of all chemical reactions (all 8 life
functions) in an organism

HOMEOSTASIS:
 Condition of maintaining a stable internal
environment.
 Ex: regulating body temperature



Smallest: Organelle…….. (nucleus)
Cell…………….. (1 heart cell)
Tissue…………. (50 heart cells)
Organ…………. (the heart)
Organ System…(the circulatory system)
Largest: Organism……… (a human)