Download A Voyage Through the Human Body

A Voyage Through the Human
Body
Mr. Knebel’s
4th Grade Science Class
Skeletal System
• Your body has about 206
individual bones.
• Each is used to perform a
specific function.
More About Bones
• Bone is composed of a
flexible protein called
collagen.
• It is also made of a
ridged mineral salt of
calcium and
phosphorus.
Facts
• The longest bone in
the body is the femur
(located in the upper
leg)
• The smallest bone in
the body is the stirrup
(located in the innerear)
The Skull
• The skull is composed
of 18 flat bones
(plates) that fuse as we
grow.
• The skull may take up
to 40 years to fully
harden.
Cartilage
• Cartilage is a soft
rubbery material.
• It is used to connect
our ribs to the sternum
(breastbone), and the
ends of bones in
moving joints.
Connects the Bones.
• Tendons connect
muscle tissue to bone.
• Ligaments connects
bone to bone. They
often guide the
direction of the
tendons.
FOSS Investigations
• Bones
• Joints
• Muscles
• Coordination
Web Resources
• www.fossweb.com
• http://www.bbc.co.uk/science/humanbody/
• http://www.vilenski.org/science/humanbody
/