A Look Inside the Circulatory System

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A Look Inside the Circulatory System

• By Brittany and Katie

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Your Introduction to the Circulatory System
Were here to introduce the circulatory system.
The circulatory system is made up of two major
pieces. Without these pieces you couldnt live
because you need the heart to pump the blood
around the body and you need your blood vessels
to guide the blood to different places like the
brain.
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Whats in the System and How Each Piece Works
There are two major pieces, the heart and the
blood vessels. The heart pumps the blood and the
blood goes through the blood vessels around the
body. You need both to live.
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How to Take Care of the Circulatory System
Taking care of the circulatory system is very
important. If you smoke your blood is thinner so
you get less oxygen. If you get a shortage of
oxygen you wont live very long because your body
needs a lot of oxygen. You will also need a
monthly check-up at the doctors office.
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Fun Amazing Facts about the Circulatory System

• The heart beats 70 times a minute in an adult
  and even faster in a child
• Extra blood goes to the skin and muscles when
  were hot or working hard
• The heart beats more than 2 1/2 billion times
  without ever pausing to rest
• People once thought illnesses were caused by too
  much blood, so doctors used leeches to suck out
  the extra blood

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More Facts about the Circulatory System
Did you know...

• Over half of you blood is a liquid plasma, the
  rest is made cells, the plasma is mostly water.
• Anger and excitement make the heart beat faster
  than normal so does eating.
• Mammals and birds have hearts with 4 chambers,
  frog hearts have 3, and fish have only 2.
• People living in high places with thinner air
  have more red blood cells. Their red blood cells
  carry less oxygen.
• The right side of the heart pumps blood to the
  lungs to deliver oxygen.

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Lots More Facts about the Circulatory System
Did you know...

• A heart attack stops blood taking oxygen to the
  brain
• The heart is positioned behind the ribcage and
  between the lungs
• Red blood cells live about 4 months
• There are about 5 million red blood cells in a
  droplet of blood
• All the chambers in the heart have valves that
  control the blood flow

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Bibliography
Bruun,Ruth. The Human Body. Random House,of
Canada Limited, Toronto, 1982. Amazing Human
Body CD-ROM. New York DK Interactive Learning,
1997. Discovery Communications Inc. "Your Gross
Cool Body." The Yuckiest Site on the Internet,
2000. On-line. Internet. June 15,
2001. Available http//yucky.kids.discovery.com/f
lash/body/ McGann, Andrew. The Skeletal
System. A Look Inside the Human Body. On-line.
Internet. June 15, 2001. Available
http//bart.northnet.com.au/amcgann/body/index.ht
ml Scholastic. The Magic School Bus Explores
the Human Body CD-ROM. Microsoft Corporation,
1995.