Bobbie Williams

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Human Skeleton

• Bobbie Williams
• CS 255

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Functions

• The skeleton is the name given to a collection of
  bones that holds our body up. Our skeleton is
  very important. It does three major jobs
• It protects our vital organs such as the brain,
  the heart and the lungs.
• It gives us the shape that we have. Without our
  skeleton, we would just be a blob of blood and
  tissue laying on the floor.
• 3. It allows us to move. Our muscles are attached
  to our bones, so when our muscles move, they move
  the bones and we move.

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• The skeleton has two main parts the axial
  skeleton and the appendicular skeleton.

Axial Skeleton consists of the skull, the spine,
the ribs and the sternum. It includes a total of
80 bones.
The appendicaular skeleton includes two limb
girdles the shoulder and the pelvis and their
attached limb bones. It includes a total of 126
bones.
Click here to see picture of the axial and
appendicular skeleton!
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How many bones do we have?

• When a baby is born its body contains 300
  bones. Most of these are not hard and sturdy
  like the bones in the adult skeleton. Baby bones
  are made of a material called cartilage. It is
  soft and flexible, kind of like your ear lobes
  and nose. Over the course of childhood, the
  cartilage-like bones slowly harden. During
  puberty some bones start to grow together to
  produce 206 adult bones. Its not until we reach
  17-21 years of age that the cartilage completely
  hardens into bone. Once it has hardened, bones
  will no longer grow.

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What are bones made of?

• Bones in our body are very much alive. They
  have their own nerves and blood vessels and they
  do various jobs, such as storing the bodies
  minerals. Calcium is the building blocks of
  bones. Milk and milk products such as cheese,
  and yogurt are good sources of calcium and should
  be part of our daily diet.

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How do bones work?
The bones in our body do not work on their own.
They join together to form joints. The end of
each bone is covered by a tough, smooth shiny
substance called cartilage. The cartilage
covered bone ends are kept apart by a thin film
of slippery fluid that works like oil in a car.
This is so your bones do not scrape and bump
against each other when you move. Our bones are
held together by stretchy bands called ligaments.
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Interesting Facts -The human hand has 27 bones
your face has 14! - Your thigh bone, the femur
is the longest bone in our body-- it's about ¼ of
your height. The smallest is the stirrup bone
in the ear which measures 1/10 of an inch.
-Humans and giraffes have the same number of
bones in their necks! Giraffe neck vertebrae are
just much, much longer! -You have over 230
moveable and semi-moveable joints in your body.
-Every 24 hours our body grows 40 yards of
hair -The human body release ½ a pint of sweat in
the course of a single day -Every morning when we
wake up we see a new world. The first time we
open our eyes the top layer of vision receptors
is simple scorched away.
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To learn more Check out the links below
Skeleton Worksheet Human Bones Matching
Quiz Skeleton Williams Link Page