The Skeletal System Third Grade Science Class

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The Skeletal System Third Grade Science Class

• By Mrs. DeLaCruz

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Welcome

• We will be learning and identifying
• parts of the skeletal system.
• We will understand how all the
• parts function within the whole unit.
• Indiana Academic Standard 3.6.1 and 3.6.2

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What would happen if we did not have any bones?

• Without bones
• Our bodies would be just like a bean bag.
• We could not walk.
• Well look like a puddle of skin and organs.

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Bones have two purposes

• It provides the structure which enables you to
  stand tall.
• It protects the main organs in our bodies.
• Skull protects our brain
• Rib cage protects our heart and lungs
• Vertebrae protects the spinal cord

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How many bones do we have?

• At birth, we are born with over 300 bones
• As we grow older, the bones are
• then fused together
• Later in life,
• an adult has only 206 bones.

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How do your bones move?

• With help from our muscles and joints.
• Muscles are attached to bones. When muscles
  contract, the bones act as levers, that allows
  various body parts to move.
• Joints provides a flexible connections between
  these bones.
• Knees work like door hinges
• Neck pivots so that you can turn your head
• Shoulders enable you to move your arms 360
  degrees

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What are the function of the skeletal system?

• It provides shape and form for our bodies.
• It supports and protect our vital organs.
• It allows our body to move about.
• It produces blood for the body.
• It stores minerals.

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Did you know

• There are 27 bones in each hand.
• The neck has 7 bones. A giraffe has 7 neck bones
  too, but its bones are very long!
• There are more than 20 small bones in the
  backbone or spine. Each bone has hole in it for
  the spinal cord.
• The hip bone or pelvis has 6 bones joined
  together. Its shaped like a bowl.
• The thigh bone is called a femur. It is the
  strongest, heaviest, and longest bone in the
  human body.
• The leg bone is really 2 bones. The fibula is on
  the side and the tibia is in front.
• There are more than 20 bones in each foot! The
  foot bones grow faster than any other bones in
  the body.

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Class Assignment

• We will make a model of a skeleton with
• q-tips.
• Supplies
• Glue
• Construction paper
• Scissors
• And a little imagination

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In Summary What This Means

• The Skeletal system serves many important
  functions. It provides the shape and form for our
  bodies. In addition, the skeletal system allows
  bodily movement. The bones serve as a storage
  area for minerals such as calcium and phosphorus.
  Blood cells are produce by the marrow located in
  some bones.

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Additional Resources

• Refer to these web cites for additional
  information
• http//www.42explore.com/skeleton.htm The human
  skeleton labeled with the names of the bones.
• http//www.enchantedlearning.com/subjects/anatomy/
  skeleton/Skelprintout.shtml A review on the facts
  of the human skeleton.
• http//yucky.kids.discovery.com/noflash/body/pg000
  124.html A breakdown of the function of the
  skeletal system.
• http//vilenski.org/science/humanbody/hb_html/skel
  eton.html Additional information on the function
  of the skeletal system. There is a picture of the
  skeleton with the outlining of the skin.
• http//www.mnsu.edu/emuseum/biology/humananatomy/s
  keletal/skeletalsystem.html Detail information
  about the function of the different types of
  bones.
• http//www.ecsu.ctstateu.edu/depts/edu/textbooks/s
  keleton.html A history of the study of archeology
  of peoples bones left behind.

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Congratulation you made it!!!

• Now you know about your skeletal system. Lets
  get up and dance.