Download white blood cells and platelets

Find your Science Journal and copy these
charts.
What is it? What does it do?
Heart
Atriums
Ventricles
Vessels
Arties
Veins
Capillaries
Plasma
Blood
Red Blood Cells
White Blood Cells
Platelets
The circulatory system is made up of the
heart, veins, arteries and blood.
Despite some misconceptions, the heart is not
one big, open organ through which blood
runs. Instead, it is about the size of your fist
and is broken into four separate chambers
(rooms).
Why does it make
sense that a shorter,
smaller person can
be healthy with a
smaller heart?
There are two upper
and two lower
chambers. The upper
chambers are called the
atriums (left and right)
and only receive blood
from the body.
The lower chambers
are called the
ventricles(left and
right), and their task is
to send blood out to the
body.
How does blood travel through your body?
Are you like a big water balloon filled with
blood?
carry oxygenated blood (blood that
has received oxygen from the lungs) from the
heart to the rest of the body.
• The blood then travels
through the veins back to
the heart and lungs, where
it receives more oxygen.
• Capillaries connect arteries
and veins.
As the heart beats, you can feel blood
traveling through the body at your pulse
points — like the neck and the wrist — where
large, blood-filled arteries run close to the
surface of the skin.
FAQ – Is blood always red?
Blood is red, inside your body and out. That is,
unless you’re a fictitious character such a
Vulcan from Star Trek, then your blood may be
green or some other color. But if you’re a
human being from the planet Earth, your blood
is red!
FAQ – Why does the blood that I can see in
the veins in my wrist look blue?
The reason your veins appear blue is because
you are looking through your skin. A
phlebotomist wrote of an experiment using
glass tubes of blood immersed in milk, in which
they appeared blue at a certain depth for the
same reason.
What is blood made of?
Blood is made up of many different things:
plasma (5%) and water (50%), white blood
cells and platelets (<1%), and red blood cells
(45%).
The plasma is a water and
salt substance that contains
the blood's proteins. It
allows blood to flow.
The white blood cells are
known as the army and fight
off infections and diseases.
Platelets are the smallest cells in the blood. They
form clots to stop the flow of blood in case you
have an injury.
Red blood cells contain hemoglobin, which is
responsible for carrying oxygen to your body. Blood
has many important jobs!
Unfortunately, sometimes the
heart, veins, or arteries can become
blocked by cholesterol, which does
not allow the blood to flow through
your body. Your body needs oxygen
to survive, so imagine what would
happen if you could not get blood
moving through your body to
obtain this essential oxygen. To
prevent heart attacks, medical
engineers have worked to create
devices to clear such blockages.
One common procedure used
to clear clogged arteries is
called angioplasty. During this
procedure, a tiny balloon is
inserted into the clogged artery
and is then inflated. The artery
opens, and then the doctor
places a device called a stent
into the artery to keep it open
after the procedure is
completed. This allows the
blood to flow through the area
of the artery that was
previously blocked.
* Complete “Blood Cell Model” &
“Blood Cell Math”
* Read pgs 56 – 61 in the student book
* Sketch a diagram of your heart in
your journal
* Why is it important for a blood cell’s
membrane to be flexible enough for
the cell to change shape?
Sketch this chart in your science
journal.
Resting Heart
Rate
Immediately
After Exercise
3 Minutes After
Exercise
3 Volunteers Needed
What prediction can you make
about heart rate before, during,
and after 1 minute of rigorous
exercise?
Resting Heart
Rate
Immediately
After Exercise
3 Minutes After
Exercise
Answer in your journal:
Why is it important for your heart
to beat faster when you exercise?