What is the skeletal system
Your Skeletal system is all of the bones in the body and
the tissues such as tendons, ligaments and cartilage
that connect them.
Your teeth are also considered a part of the skeletal
system but there not labeled as bones.
Your teeth are made of enamel and dentin.
SOMETHING to know is Enamel is the strongest
substance in your body!!
The support , movement, protection
The main job of the skeleton is to provide support for our
body. Without your skeleton your body would collapse into
a heap. Your skeleton is strong but light. Without bones
you'd be just a puddle of skin and guts on the floor.
Bones provide the structure for muscles to attach so that
our bodies are able to move. Tendons are tough inelastic
bands that hold attach muscle to bone.
Your skeleton also helps protect your internal organs and
fragile body tissues. The brain, eyes, heart, lungs and spinal
cord are all protected by your skeleton. Your cranium
(skull) protects your brain and eyes, the ribs protect your
heart and lungs and your vertebrae (spine, backbones)
protect your spinal cord.
What is bone made of?
A typical bone has an outer layer of hard or compact
bone, which is very strong, dense and tough. Inside
this is a layer of spongy bone, which is like
honeycomb, lighter and slightly flexible. In the middle
of some bones is jelly-like bone marrow, where new
cells are constantly being produced for the blood.
Calcium is an important mineral that bone cells need
to stay strong so keep drinking that low-fat milk!
Common Name Scientific Name
shoulder blade scapula
breast bone sternum
funny bone humerus
thigh bone femur
shin bone tibia
Things to know
When you were born you had over 300 bones. As you
grew, some of these bones began to fuse together. The
result? An adult has only 206 bones!
With a lot of help. You need muscles to pull on bones
so that you can move. Along with muscles and joints,
bones are responsible for you being able to move. Your
muscles are attached to bones. When muscles
contract, the bones to which they are attached act as
levers and cause various body parts to move.
The human hand has 27 bones; your face has 14!
The longest bone in your body, Your thigh bone, the
femur -- it's about 1/4 of your height. The smallest is
the stirrup bone in the ear which can measure 1/10 of
humans and giraffes have the same number of bones
in their necks? Giraffe neck vertebrae are just much,
You have over 230 moveable and semi-moveable joints
in your body
Words to know
*HINT THESE WILL PROBABLY BE ON THE TEST!!
Tendons- are tough inelastic bands that hold attach muscle to bone.
Bone marrow- The soft, spongy tissue found in the center of most
large bones that produces the white cells, red cells, and platelets.
Vertebra- Any of the bones or cartilaginous segments forming the
Cranium-The portion of the skull enclosing the brain; the braincase.
A tough, elastic, fibrous connective tissue found in various parts of the
body, such as the joints, outer ear, and larynx. A major constituent of
the embryonic and young vertebrate skeleton, it is converted largely to
bone with maturation.
Ligament- Anatomy A sheet or band of tough, fibrous tissue
connecting bones or cartilages at a joint or supporting an organ.