Transcript cardiovascular-system

1. The job of the circulatory system is to
carry Chemicals around the body.
Blood
2. If you had blood drawn from your arm it
could be separated into four parts.
3. 1st part Plasma
a. 90% Water, the liquid parts of blood
b. Carries chemicals such as minerals,
vitamins, digested foods, wastes, and
proteins. Proteins help clot blood.
4. 2nd part- Red blood cells
a. Most numerous
b. Tiny disc shaped and red
c. carries oxygen and carbon dioxide
d. RBC’s have hemoglobin which allows them to
carry oxygen and carbon dioxide.
e. Does not have a nucleus
f. Constantly being made in the bone marrow
g. Lives about 120 days
h. Old red blood cells are removed by the liver
5. 3rd part White blood cells
a. Large colorless cells
b. destroy disease causing organisms
c. Made in bone marrow
d. Have a nucleus
e. squeeze out of blood vessels and move
like an amoeba to attack germs and
destroy them anywhere in the body.
f. a liquid called pus is actually the remains
of dead bacteria and white blood cells.
6. 4th part – platelets
a. colorless, tiny pieces of cells
b. helps clot blood. Go to site of wound
and break apart releasing a special
chemical. This chemical and protein form
a web which traps red blood cells . The
trapped red blood cells then dry and form
a scab.
7. Your body is constantly making new blood
to replace the old. But, if too much blood
is lost because of a disease or accident, a
doctor can replace lost blood by a
transfusion. Transfusion- transfer of blood
from one person to another.
8. There are 4 types of blood A, B, AB, and
O. The blood type is determined by
proteins on the outside of the Red blood
cells.
AB Universal __Receiver____ (person
receiving)
O Universal ____Donor____
9. Blood Disorders
1. Anemia: the body does not make enough
red blood cells.
2. Leukemia: the body produces too many
white blood cells and many of the white
blood cells do not work properly.
3. Hemophilia: blood does not clot properly.
“Bleeders disease” Inherited disease
that mainly affects males.
10. Strongest muscle in your body is your
heart.
11. Location: it hangs the center of the chest
between your lungs and behind the
breastbone (sternum).
12. Job: Pump fluid throughout your body.
Beats approximately 70 times a minute.
13. You can think of your heart as 2 pumps
working side by side. The right side
pumps blood to your lungs to pick up
oxygen. The left side pumps this oxygen
rich blood to your body.
14. Two pumps are divided into 4 spaces
called chambers. Your heart is actually a
2 barreled 4 chambered pump.
15. The two upper chambers are called
atriums. They pump blood into the bottom
two chambers. The bottom chambers are
called ventricles. They pump blood out of
the heart.
16. You will hear 2 sounds during every
heartbeat. The valves between the
atriums and the ventricles make a Lubb
sound as they click open and shut. Then a
pause. Dubb is the sound of the valves
closing as the blood leave the heart. LubDub-Lub-Dub.
17. Sometimes the clear clicking noises of
the heartbeat may sound like Lubb-shhbdubb. This means the valve aren’t working
properly and there is some leakage. This
is called a murmur.
18. The force needed to squeeze a new
tennis ball is similar to the force needed to
squeeze blood out of the heart. If you
squeeze 70 times a minute (normal pulse)
you will get an idea how hard your heart
works.
19. Blood without oxygen enters the heart
through the vena cava. The blood without
oxygen goes into the right atrium, through
a valve and into the right ventricle.
20.The blood goes through a valve into the
pulmonary arteries. Blood goes into the
lungs through capillaries where they
exchange carbon dioxide for oxygen.
22. The capillaries come together and send
the blood loaded with oxygen back to the
heart through pulmonary veins.
23. The blood enters the left atrium, which
pumps it through the valve into the left
ventricle.
24. The left ventricle pumps it through a
valve into the aorta
25.Three kinds of blood vessels:
1. Arteries: Handle the fast and furious rush of
the blood containing oxygen. They carry blood
away from the heart. They are big muscular
tubes with thick layers of elastic walls. Arteries
are what we press when we want to find our
pulse.
Heart attacks: Artery carrying blood to the heart
becomes blocked by a clot. The heart muscle
does not get enough blood.
26. Capillaries: the tiniest blood vessels .
They are finer than a hair. Blood cells
have to line up one by one to pass through
the capillaries. Walls are very thin so that
nutrients and oxygen, carbon dioxide can
all pass through. Every cell in your body is
no more than a hairs width from a
capillary.
27. 3 veins: they return blood to the heart.
They appear as blue lines through the skin
that you can see. Blood flow (speed it
travels in the veins is a lazy river
compared to the frantic rush in the
arteries. The blood moves slowly and
smoothly so the walls of the veins are thin,
but not as thin as capillaries. Muscle
activity squeezes and pinches the veins
enough to ensure that flow is not broken.
Veins have one way valves. These valves
keep the blood from flowing backwards.
28. Pulse: You hear a heartbeat, but you
feel a pulse. The pulse is caused by blood
stopping and starting as it rushes through
the arteries. You can actually feel the
walls of the artery.
29. Exercise- the heart is a muscle, and like
any other muscles it will respond to
exercise by becoming larger and stronger.
A big, athletic heart can do the same
amount of pumping work with fewer beats.
It is a proven fact that athletes live longer,
on the average.