Body
Organization
and Structure
Cp 1 sec 1
HOMEOSTASIS
The human
body’s
maintenance of a
stable internal
environment.
My
Beloved
Cells
I will miss
you!
If
homeostasis
is interrupted,
cells suffer
and
sometimes
die.
THE WORK OF CELLS
On a baseball team, every
player has his job.
Cells have their own
positions (or jobs) in
the body!
Groups of cells working
together form a TISSUE
There are 4 types of tissues:
 Epithelial Tissue
 Nervous Tissue
 Muscle Tissue
 Connective Tissue
EPITHELIAL TISSUE
Covers and protects underlying
tissue. When you look at the surface
of your skin, you see epithelial tissue
MUSCLE TISSUE
Made up of cells that can contract
and relax to produce movement
NERVOUS TISSUE
Sends electrical signals through
the body. It is found in the
brain, nerves and sense organs.
CONNECTIVE TISSUE
Joins, supports, protects, insulates,
nourishes, and cushions organs. It
also keeps organs from falling apart.
TISSUE + TISSUE= ORGAN
Two or more tissues working together,
form an organ
One type of
tissue alone
cannot do all
of the things
that several
types working
together can
do.
ORGAN + ORGAN = ORGAN SYSTEM
Organs working together
make up an organ system.
The failure of any
part can affect
the entire system
11 MAJOR ORGAN SYSTEMS
 Integumentary system
 Reproductive system.
 Muscular system
 Skeletal system
 Cardiovascular system
 Respiratory system
 Nervous system
 Lymphatic system
 Digestive system
 Urinary system
 Endocrine system
Integumentary System
Includes
skin, hair,
nails and
their
underlying
tissues
Muscular System
Skeletal muscles move bones.
Skeletal System
Bones frame
and protect
body parts.
Cardiovascular
System
The heart
pumps
blood
through
blood
vessels.
Respiratory System
Lungs absorb oxygen and
release carbon dioxide.
Urinary System
Removes wastes from the blood and
regulates body fluids.
Reproductive System
Females produces eggs, feed/shelter unborn
baby- males produce sperm.
Nervous System
Receives and sends electrical
messages.
Lymphatic
System
Returns leaked
fluids to blood
vessels and
helps flush
harmful germs
out.
Digestive System
Breaks
down
food into
nutrients
.
Endocrine System
Glands regulate body functions by
sending out chemical messages.
ORGAN
SYSTEM
ORGANS
TISSUES
CELLS
DISCUSSION QUESTIONS
1. Explain the relationship between cells,
tissues, organs and organ systems.
2. Compare the four kinds of tissues found in
the human body.
3. Describe a time when homeostasis was
disrupted in your body.
4. Which body systems do
you think were effected?
T/F QUICK QUIZ
Homeostasis is the maintenance of a stable
internal environment.
2. Epithelial tissue sends electrical signals
throughout the body.
3. Blood is a type of connective tissue.
4. The endocrine system consists of skin, hair,
nails and their underlying
tissue.
5 The lymphatic system returns
leaked fluids to blood vessels.
1.
Homework
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