The Human Heart

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The Human Heart
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Diagram of the Heart
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Chambers of the heart

• The heart has four chambers or parts. These are
  called

Right atrium
Left atrium
Left ventricle
Right ventricle
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Blood Vessels

• Veins are tubes which bring blood without oxygen
  into the heart.
• Arteries are tubes which take blood with oxygen
  away from the heart and bring it all around the
  body.
• Together they are called blood vessels.

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How the Heart Works

• Blood without oxygen comes into the heart through
  a vein.
• It goes into the first chamber called the right
  atrium.
• It then goes through an opening called a valve
  into the right ventricle.
• From there it is pumped to the lungs to collect
  some oxygen.

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Going into the Heart
Blood without oxygen
Off to the lungs we go!
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How the Heart Works

• Blood with oxygen comes back to the heart from
  the lungs.
• It goes into the left atrium.
• It then goes through an opening called a valve
  into the left ventricle.
• From there it is pumped away from the heart and
  all around the body through a very special artery
  called the aorta.

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Coming out of the Heart
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Back from the lungs
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A Video on the Heart

• http//www.heartlibrary.com/heart-library-heart-an
  atomy.aspx

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Experiment Time!
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Finding our Pulse!

• Put your left hand out.
• Put out your middle and pointing finger on the
  right hand.
• Place them on your left wrist below your thumb
  and search for a beat. This is your pulse.
• The pulse tells us how quickly the heart is
  pumping blood around the body.
• It should beat about 70 times every minute.

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Finding our Pulse!

• COUNT HOW MANY TIMES YOU FEEL YOUR PULSE BEAT IN
  ONE MINUTE.
• Record your answer.
• My pulse is _____ per minute.

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Finding our Pulse!

• Jog on the spot for one minute.
• Now count how many times you feel your pulse beat
  in one minute.
• Record your answer.
• When I ran for 1 minute my pulse was _____ per
• minute.

What happened to your pulse when you ran for one
minute? Why do you think this happened?
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Finding our Pulse!

• Do jumping jacks for one minute.
• Now count how many times you feel your pulse beat
  in one minute.
• Record your answer.
• When I did jumping jacks for 1 minute my pulse
  was_______________ per minute.

What happened to your pulse when you did jumping
jacks for one minute? Why do you think this
happened?