The Skeletal System
Name: ____________
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Label the parts of the skeleton.
Hint: There are 3
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Hint: There are 3
3…
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Arms:
1.___________________________________
_____________________________________
2.___________________________________
_____________________________________
Legs:
1.___________________________________
_____________________________________
2.___________________________________
_____________________________________
Why do we have bones?
1.___________________________________
_____________________________________
2.___________________________________
_____________________________________
3.___________________________________
_____________________________________
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Fill in the blanks as you read along.
Our bones provide __________ and ___________ for our bodies.
Without bones we would be a shapeless blob of skin and tissue.
Bones protect our vital organs such as our ________, _________
and _______. Without having bones, our organs are exposed to
the many dangers of life. Without bones, we wouldn’t be able to
________. Muscles are attached to bones by bands of tissue
called _________. Bones are necessary because the muscles need
something to attach to in order to contract and cause motion.
Bones also are important as a center for the production of _______ _______. The inside of bones is filled with a jelly-like
material called bone ________, which is where red blood cells
(needed to transport oxygen throughout the body) are made. It is
also where white blood cells (needed for the immune system),
adipocytes (fat cells) and fibroblasts (needed to make connective
tissue) are made.
Bones also are responsible for the regulation of _________ levels.
Calcium levels in the blood have to be kept in a narrow range to
make sure that nerves and muscles are able to properly work.
Much of the body's calcium is ___________ in bones.
Your bones help you out every day so make sure you take care of
them. Here are some tips:
Protect those skull bones (and your brain inside!) by wearing a
__________ for bike riding and other sports. When you use a
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skateboard, in-line skates, or a scooter, be sure to add wrist
supports and elbow and knee pads. Your bones in these places
will thank you if you have a fall!
If you play sports like football, soccer, lacrosse, or ice hockey,
always wear all the right equipment. And never play on a
trampoline. Many kids end up with _________ bones from
jumping on them. Broken bones can eventually heal, but it takes a
long time and isn't much fun while you wait.
Strengthen your skeleton by drinking ________ and eating other
dairy products.
They all contain __________, which helps bones harden and
become _________.
Be active! Another way to strengthen your bones is through
exercise like running, jumping, dancing, and playing sports.
Take these steps to be good to your bones, and they will treat you
right!
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Use the words in the box to fill in the blanks.
protect
skeleton
skeletal
blood
ribcage
cranium
shape
tendon
ligaments
bones
minerals
jellyfish
marrow
move
There are around 206 ________________ in the adult human body.
These bones plus the connecting tissue make up the _______________
system.
The skeletal system is very important for many reasons. Some bones help
_____________ our organs. The _____________, for example,
protects our brains and the ________________ protects our lungs.
The skeletal system also gives us our _______________. Without a
______________, we would be shapeless blobs like a ______________
or an earthworm. Our bones, which are connected by ______________,
provide a frame for the rest of the organs, giving us our unique body
shape.
The skeletal system also helps us ______________. Muscles, which are
attached to bones by _______________, they cause the bones to move,
which makes our bodies move.
Bones also help your body store ________________ such as calcium. If
there is too much calcium in the blood, some of it becomes bone. If there
is not enough calcium, then the bones give some to the blood.
Finally, another important function of bones is to produce
________________. Inside bones there is a soft substance called
________________, which is used to make blood cells.
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