Circulatory System

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Circulatory System

• Holly Cole

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Circulatory System

• The circulatory system is our bodys main
  transportation and cooling system. It is how
  oxygen and nutrients reach our bodys cells, and
  waste materials are carried out.
• Blood that is moving away from the heart carries
  oxygen and nutrients to every part of the body.
  Blood making the return trip picks up waste so
  that your body can get rid of it.

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Circulatory System Parts

• Blood
• Most of the blood in your body is a colorless
  liquid called plasma.
• Red blood cells are what make your blood the red
  color. As they travel away from the heart red
  blood cells deliver oxygen to all parts of the
  body. They pick up waste as they travel back to
  the heart.
• White blood cells work as a defense system for
  your body.
• Platelets are cells that help your body repair
  itself.

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Circulatory System Parts

• Heart
• Your heart is a muscle about the size of a fist.
• It contracts and relaxes about 70 times per
  minute if you are at rest, if you are exercising
  it contracts and relaxes many more times per
  minute. This is your heart rate.
• Your heart pumps blood to your entire body as it
  is contracting.

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Circulatory System Parts

• Blood Vessels
• Blood vessels are a rubbery pipeline with many
  branches that wind throughout your entire body.
• Arteries are blood vessels that carry blood away
  from your heart.
• Veins are blood vessels that carry blood toward
  your heart.
• Capillaries are like the turnaround point for
  your blood. Arteries carry the blood to these
  smaller branches, capillaries, the blood is then
  brought back to the heart through veins.

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Blood Vessels
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Circulatory System Path

• When you inhale, oxygen enters your lungs.
• Blood is pumped from you heart to your lungs
  where it picks up oxygen.
• This oxygen filled blood is sent back to the
  heart to get pumped to the arteries and through
  capillaries.
• The blood travels through the entire body
  delivering nutrients.
• Blood then enters veins to make the return trip
  back to the heart to pick up more oxygen. Along
  the way it picks up any waste to be removed from
  the body.

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Circulatory System Path
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Fun Facts

• Adult bodies contain over 60,000 miles of blood
  vessel.
• Adult hearts pump almost 4,000 gallons of blood a
  day.
• A heart beats 30 million times a year.
• Adults have an average of 15 pints of blood in
  their bodies.
• A three year old has approximately 3 pints of
  blood in their bodies.

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Helpful Sites

• Click on the links below to get additional
  information on the circulatory system.
• All About the Heart
• Circulatory System