Science Lesson 7

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Science Lesson 7 Our Skeletons
WALT understand that we have a skeleton within
our body
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The Skeleton Protects
My brain is protected by my skull.
My heart and lungs are protected by my rib cage.
Our skeletons protect the main organs of our
bodies.
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The Skeleton Supports
Our skeleton also supports our bodies and keeps
them upright. Our skeletons help us to lift and
move things.
Without the support of our skeletons our bodies
would fall to the floor and look like a flat
football!
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Our Skeleton helps us to move
Our skeletons help us to walk, run and move. Our
muscles are attached to our bones with tendons.
We can move because these tendons pull our bones
backwards and forwards.
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Can you name the parts of my body?
Skull
Scapula
Ribcage
Spine
Pelvis
Hand bones
Foot bones
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What do bones do?

• Our bones make up our skeleton.
• An adult has 206 bones in their skeleton.
• Our skeleton supports our body and protects our
  organs.
• Without a skeleton we would just be one big
  wobbly jelly!!!

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What do bones help us do?

• Some bones help us move.
• Bones in the hands and arms help us life and
  carry.
• Bones in the legs help us run and jump.
• Where two bones join together, this is called a
  joint.
• Bones are held together at joints by tough fibres
  called ligaments.

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More about bones...

• Bones are made of living tissue.
• Each bone has its own special name.
• Bones are made up of several layers.
• About half of a bone is just water.

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The skull
Skull There are 29 bones altogether in the skull
and jaw. They make a box to protect the brain,
eyes and ears.
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The ribcage
Ribcage This protects the heart and lungs and
other upper organs. There are 24 curved bones,
and the sternum runs down the middle.
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The spine
Spine It is made up of 24 individual small bones
(called vertebrae). Your spine supports your head
and body. Each of the bones are linked by small
joints which can move a little. Lots of small
movements add up and let your spine bend a lot.
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The hand bones
Hand bones There are lots of bones in your hands.
There are bones in your wrist (carpals), palms
(metacarpals) and fingers (phalanges).
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Foot bones
Foot bones There are 26 bones in your foot. They
can make an arch shape to support your body when
you stand up.
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Scapula
Scapula This is also known as the shoulder blade.
It is a flat triangular bone that lies over the
back of upper ribs. Helps with the movement of
the arm and shoulder.
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Pelvis
Pelvis Your pelvis is shaped like a bowl. It
holds all of the organs in the lower part of the
body. It is a slightly moveable joint.