The Human Heart

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The Human Heart

• The Bodys Strongest Muscle

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Interesting Facts

• Put your hand on your heart. Did you place your
  hand on the left side of your chest? Many people
  do, but the heart is actually located almost in
  the center of the chest, between the lungs. It's
  tipped slightly so that a part of it sticks out
  and taps against the left side of the chest,
  which is what makes it seem as though it is
  located there.
• Does your heart ever stop?
• Your heart beats every second of every day
  until the day you die?
• Your heart beats about 100,000 times in one day
  and about 35 million times in a year. During an
  average lifetime, the human heart will beat more
  than 2.5 billion times.
• An adult has about 5 ½ quarts of blood in his/her
  body

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How Big Is Your Heart?

• Hold out your hand and make a fist. If you're a
  kid, your heart is about the same size as your
  fist, and if you're an adult, it's about the same
  size as two fists.

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Blood Flow Through The Heart
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• Day and night, the muscles of your heart
  contract and relax to pump blood throughout your
  body. When blood returns to the heart, it follows
  a complicated pathway.
• It travels through four rooms. The blood that
  comes from the body does not have oxygen in it.
• The blood that comes from the lungs is carrying
  oxygen.

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Blood The Magical Fluid

• Blood has 4 parts
• Plasma contains water, proteins, and minerals
• Red Blood Cells are the waiters and waitresses
  that carry food (O2 CO2) to cells
• White Blood Cells The soldiers that attack and
  destroy invaders (germs)
• Platelets causes blood to clot
• When someone gets a cut, he
  or she
• wants his/her blood to clot
  so that
• bleeding stops.

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Exercise and Your Heart

• Exercise Makes Your Heart HappyYou may know that
  your heart is a muscle. It works hard, pumping
  blood every day of your life. You can help this
  important muscle get stronger by doing aerobic
  (say air-o-bik) exercise.
• Aerobic means "with air," so aerobic exercise is
  a kind of activity that requires oxygen. When you
  breathe, you take in oxygen, and, if you're doing
  aerobic exercise, you may notice you're breathing
  faster than normal. Aerobic activity can get your
  heart pumping, make you sweaty, and quicken your
  breathing.
• When your give your heart this kind of workout on
  a regular basis, your heart will get even better
  at its main job - delivering oxygen (in the form
  of oxygen-carrying blood cells) to all parts of
  your body.
• So you want to do some aerobic exercise? Try
  swimming, basketball, ice or roller hockey,
  jogging (or walking quickly), in-line skating,
  soccer, cross-country skiing, biking, or rowing.
  And don't forget that skipping, jumping rope, and
  playing hopscotch are aerobic activities, too!

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The Puzzlers ChallengeTaken from The Great Body
Shop

• Your heart pumps b______ all over your body.
• Exercise makes your heart beat f_____.
• The P_____ help the blood to clot.
• Blood carries oxygen and n______ to all parts of
  the body.
• The W____________ are the soldiers that fight off
  invaders.