BODY SYSTEMS
The human body is composed of
major systems that have differing
functions, but all of the systems work
together to maintain homeostasis.
Homeostasis
the maintenance of a constant
internal state in a changing
environment
LEVELS OF ORGANIZATION
 Cells form Tissues
 Tissues form Organs
 Organs form Organ systems
PHOTOGRAPH PG. 207
QUESTION......
What are the four levels of organization in our
bodies?
 1.
 2.
 3.
 4.
FOUR KINDS OF TISSUES
PHOTOGRAPH PGS. 206 & 207
QUESTION....
 What are the 4 kinds of tissues?
 1.
 2.
 3.
 4.
Organ Systems
photograph pgs. 208 & 209
You will need to know all 11 systems,
their functions, and how they work with
other systems to maintain homeostasis.
THE SKELETAL SYSTEM
PHOTOGRAPH PG 210
main functions:
 protection
 storage
 movement
 blood cell formation
QUESTION.....
 What are the main functions of the skeletal system?
 1.
 2.
 3.
 4.
MUSCULAR SYSTEM - PRIMARY FUNCTION IS
MOVEMENT AND FLEXIBILITY. PHOTOGRAPH PG. 214
 smooth muscle - involuntary
 cardiac muscle - involuntary
 skeletal muscle - both
 voluntary - in your control
 involuntary - not in your
control
QUESTION....
 What are the 3 types of muscular tissue?
 1.
 2.
 3.
 What is are the 2 main functions of the muscular system?
 1.
 2.
EXCERCISE!!!! Photograph pg. 215
your body needs exercise to stay healthy
and maintain homeostasis
resistance - weights
aerobic - moving
INTEGUMENTARY SYSTEM
 protection
 feeling (sense of touch)
 regulate body temp
 gets rid of waste
QUESTION.....
 What are the 4 main functions of the Integumentary
system?
 1.
 2.
 3.
 4.
Respiratory System
photograph pg. 248
main function: to take in oxygen
and expel carbon dioxide
respiration is the process that
the body gets and uses oxygen
and releases carbon dioxide and
water.
1st part is breathing
2nd is cellular respiration
How does oxygen get to all of
the cells in your body for this
process to occur?
QUESTION.....
 What is the main function of the respiratory system?
 1.
 2.
Cardiovascular System
photograph pg. 235
function to transport blood, oxygen,
and other nutrients throughout your
body.
QUESTION......
 What is the main function of the circulatory system?
 How do the cardiovascular and respiratory systems work together?
LYMPHATIC & IMMUNE SYSTEMS
main functions....
 to collect excess fluid
surrounding tissues and return
the fluid to the cardiovascular
system.
 protects against disease
parts .....
 lymph nodes
 lymphatic vessels
 thymus
 spleen
 tonsils
Digestive system
photograph pg. 260
• breaks down food into
nutrients the body can
use
• dispose of solid wastes
Urinary System photograph pg.
produce, store, and eliminate
wastes
QUESTION.....
 What are the main functions of the digestive and urinary systems?
 What do these two systems have in common?
NERVOUS SYSTEM
central nervous system - brain and
spinal cord
Peripheral nervous system - everything
else, neuron - specialized to receive
and conduct electrical impulses.
detects and responds to changes in
the environment & transmits
information as electrochemical
impulses throughout the entire
body

Photograph pg. 283
QUESTION.....
 What is the function of the nervous system?
 How do impulses travel throughout your body?
Endocrine system
photograph pg. 297
secretes hormones to
regulate body functions &
coordinates other organ
systems
QUESTION....
 What are the two main functions of the endocrine system?
 Name two endocrine glands and their functions.
ANIMAL REPRODUCTION
asexual reproduction
 a single parent has offspring that
are genetically identical to the
parent
sexual reproduction
 off spring are formed when
genetic information from more
than one parent combines
QUESTION.....
 How many "parents" are required for sexual reproduction?
 How many "parents" are required for asexual reproduction?
 Give one example for each.