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lood is made up of tiny
cells. Most of them are
red, which is why blood
looks red.
Red blood cells carry oxygen
to all parts of the body. A single drop of
blood contains millions of red blood cells which
constantly travel through your body delivering oxygen and
removing waste. Blood is made up of other kinds of cells, too.
Standards Link: Life Science: Students know that multicellular
organisms have specialized cells to perform specialized functions.
• White blood cells battle germs that invade the body.
• Platelets are cells that get sticky and thick when they
come into contact with air. When you get a cut,
the platelets get gooey and plug up the cut.
lasma is a yellowish liquid that
carries nutrients, hormones,
and proteins throughout the
body. Plasma is mostly water,
absorbed from the intestines from
what you drink and eat, with the
liver supplying important proteins.
White blood cell
Red blood cell
Platelet
If you weigh
50 pounds:
If you weigh
80 pounds:
If you weigh
100 pounds:
milliliters
or about
pints
milliliters
or about
pints
milliliters
or about
pints
se the code to find
out how much
blood is in each of
the kids at left.
Which one is closest
to your weight?
On Valentine's Day, you'll see lots of hearts –
heart-shaped candy boxes, balloons and cards
are everywhere. But your own heart is really
something to love.
Your heart beats about 100,000
times every day, pumping blood
through your body. Your blood
contains red blood cells, white blood
cells, platelets and plasma,
each with different functions.
www.kidscoop.com © Vicki Whiting May 2021
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