Grades 7-12 level PPT with animation and discussion questions

1. Illustrated and Animated
The Circulatory System
By Dean Berry, Ed. D.
The Teachers’ Choice Library

2. How do your cells get the
nutrients and oxygen that
they need to stay alive?
Which body system moves
blood around the body?

3. The circulatory system keeps blood
flowing throughout the body

4. Protected by the rib cage, the heart is a muscle
that pumps blood through the arteries and veins
to the outer extremities of the body.

5. The heart is a muscle the size of your fist that serves as a
pump to push blood under pressure from the left and
right ventricles through the arteries to the rest of the
body. Most adult hearts beat an average of 72 times per
minute when in a relaxed state. With exercise or stress
the heart beats much faster. What is an easy way
to check your heart rate?

6. What Do You Think?
• The last frame mentioned
something that makes your
heart beat faster. What was
it?
• Why might this condition
become a serious health
problem for your heart?

7. The heart has four chambers. The blood that is returning
to the heart enters from the lungs where it is provided
fresh oxygen and pours into the left atrium. Another
large vein carries blood from other parts of the body into
the right atrium. Valves enable the blood to flow into
the larger left and right ventricles and out of the
heart through the heart’s major arteries.

8. Every major organ in the body requires a constant blood
supply. When that supply is interrupted, the organ does not
function properly. Portions of the heart begin to die when
an artery that provides blood to the heart becomes clogged
and results in a heart attack. Likewise, portions of the brain
die when a stroke results in the rupture of a blood vessel.
What would happen if your wrist was tightly
squeezed by a thick rubber band for a
couple of days?

9. Blood is carried to all tissues and cells in the body through the
arteries, veins, and tiny capillaries. The arteries carry the blood
under pressure away from the heart to the outer extremities.
What might happen if a large artery is cut?

10. The carotid arteries on each side of the neck
carry blood to our brains. However, if cholesterol
builds up and inflammation occurs, the arteries
can cause small pieces of blood clots to flow into
the brain and damage blood vessels that serve
sections of the brain. Damage can cause
paralysis on one side of the body, verbal and
mental confusion, visual problems, or death. Why
do you think that the paralysis occurs on
one side of the body?

11. What Do You Think?
What are some of the
factors that might put a
person at higher risk for
heart disease?

12. A diet high in saturated fat, high blood
sugar levels, lack of exercise, stress, and
high blood pressure are factors that put
people at increased risk for heart attacks
and strokes. Why do you think that
lack of exercise would be a risk
factor for heart disease?

13. If the lining of a major artery in the heart
becomes inflamed and clogged with
cholesterol, the blood in the artery can be
blocked and cause a heart attack. What are
the symptoms that might indicate a heart
attack?

14. Blood cells flow through our arteries in
order to carry oxygen and nutrients to
every cell in our body. After providing the
cells in our tissues and organs with what
they need, the blood flows back to the
heart through our veins. What might
happen if blood clots too easily in
a major leg vein?

15. Art
•
In summary, blood vessels are duct-like organs which are
connected to the heart. Arteries carry oxygen and nutrient
rich blood from the heart to all of the tissues and cells of
the body. Veins bring impure blood containing waste
material from all the tissues and cells back to the heart and
the excretory organs. Capillaries are very tiny vessels that
form a network carrying blood to and from arteries and
veins. What is meant by Nutrient Rich Blood?

16. When the blood cells reach our tissue, there is an
exchange of nutrients and waste material as well as
oxygen and _________. What is missing in this
blank?

17. This exchange of gases from our blood to the body cells is called
diffusion. Cells that are unable to receive this infusion of oxygen
and nutrients begin dying. For that reason, poor circulation in the
feet and legs can result in an amputation of dying limbs.

18. What Do You Think?
The last frame indicated
that poor circulation in your
legs could lead to
amputation of a limb. Why
would poor circulation lead
to such a drastic result?

19. Our arteries and veins carry several different cells and structures
in the blood stream. White blood cells provide a critical function
for our immune system. They rush to the site of infections to kill
off the invading bacteria. Millions of white blood cells create
inflammation and swelling in the area of the infection.

20. White blood cells eventually die when they battle
invading bacteria. Abscesses and white heads on
pimples result in left over dead white cells(puss).
What might happen to one’s health if
white blood cells are produced at a
significantly slower rate?

21. Examine this drawing and determine
what has happened to this person.

22. What is happening to this artery?
What danger does this pose?

23. Analyze these two illustrations and
determine what was happened. How
might this patient be affected by what
has happened?

24. Why do you think that diabetes
sometimes leads to blindness?

25. What is the effect of performance
enhancing drugs on your health?

26. What does this video clip suggest
about human health?

27. Group Discussion
Meet in groups and discuss the following.
• 1. Describe the major organs of the circulatory
system.
• 2. What is the primary purpose of the circulatory
system?
• 3. How can people protect themselves from
circulatory system diseases?

28. Prepare to Write
Write an explanatory essay describing the function
of the major organs of the circulatory system and
how they interact to serve the vital needs of the
body. Include an explanation of how people can
reduce their risk of circulatory system disease.