2. The Skeletal SystemThe Skeletal System
What is a Bone?What is a Bone?
The Inside of a BoneThe Inside of a Bone
Four Main Jobs of a BoneFour Main Jobs of a Bone
The SpineThe Spine
RibsRibs
Hands and FeetHands and Feet
Hips and LegsHips and Legs
ArmsArms
JointsJoints
Joints MovieJoints Movie
QuizQuiz
About the AuthorAbout the Author
ReferencesReferences
Concept MapConcept Map
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3. What is a Bone?What is a Bone?
The skeletal system is made up of the bonesThe skeletal system is made up of the bones
and cartilage that forms the framework of yourand cartilage that forms the framework of your
body.body.
We have bones so that we are not a puddle ofWe have bones so that we are not a puddle of
skin and guts on the floor.skin and guts on the floor.
Babies have 300 bones.Babies have 300 bones.
Adults have 206 bones.Adults have 206 bones.
Click on the link to watch a
video on bones!
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http://youtu.be/o6uog6zt79Y
4. The Inside of a BoneThe Inside of a Bone
A bone is made up of salts, water, andA bone is made up of salts, water, and
tissue.tissue.
Inside a bone there is a jelly substanceInside a bone there is a jelly substance
called bone marrow.called bone marrow.
Bone marrow produces blood cells for theBone marrow produces blood cells for the
body.body.
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5. Four Main jobs of a Bone:Four Main jobs of a Bone:
1.1. To protect your body andTo protect your body and
give it shape.give it shape.
2.2. To protect your internalTo protect your internal
organs.organs.
3.3. To provide a scaffolding forTo provide a scaffolding for
your muscles, allowing youyour muscles, allowing you
to move.to move.
4.4. To store minerals andTo store minerals and
make blood cells.make blood cells.
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6. The SpineThe Spine
The spine is the central support forThe spine is the central support for
the body.the body.
The spine is made up of separateThe spine is made up of separate
bones called vertebrae.bones called vertebrae.
Between each vertebrae isBetween each vertebrae is
cartilage which keeps bones fromcartilage which keeps bones from
rubbing against each other.rubbing against each other.
FUN FACT: there are 26 vertebraeFUN FACT: there are 26 vertebrae
in the human body.in the human body.
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7. RibsRibs
““Your rib cage is made up of 12 vertebrae,Your rib cage is made up of 12 vertebrae,
24 ribs and a breastbone in three parts. It24 ribs and a breastbone in three parts. It
protects your heart and lungs from knocksprotects your heart and lungs from knocks
and bumps.”and bumps.”
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8. Hands and FeetHands and Feet
The bones in your hands and feet are VERYThe bones in your hands and feet are VERY
flexible.flexible.
The foot has 26 bones. (tarsals, metatarsels,The foot has 26 bones. (tarsals, metatarsels,
and phalanges)and phalanges)
The hand has 27 bones. (metacarpals, carpals,The hand has 27 bones. (metacarpals, carpals,
and phalanges)and phalanges)
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9. Hips and LegsHips and Legs
The hip bone helps us toThe hip bone helps us to
stand upright and move.stand upright and move.
The main bones of theThe main bones of the
legs are the tibia, fibia,legs are the tibia, fibia,
and femur.and femur.
The patella (kneecap) isThe patella (kneecap) is
also important!also important!
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10. ArmsArms
The bones in the arm areThe bones in the arm are
very flexible.very flexible.
The three bones that makeThe three bones that make
up the arm are the ulna,up the arm are the ulna,
radius, and humerus.radius, and humerus.
The two bones that form theThe two bones that form the
shoulder are the clavicle andshoulder are the clavicle and
the scapula.the scapula.
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11. JointsJoints
The Pivot Joint Hinge JointThe Pivot Joint Hinge Joint
The Gliding Joint Ball-and-socketThe Gliding Joint Ball-and-socket
JointJoint
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Joints!
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12. Joints Movie!Joints Movie!
Click on the link to watch a movie aboutClick on the link to watch a movie about
the different joints.the different joints.
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http://youtu.be/woUFwL1Ry5A
13. QuizQuiz
1.1. How many bones are in an adult? 4. What is another name forHow many bones are in an adult? 4. What is another name for
kneecap?kneecap?
A.A. 342342 bonesbones AA.. SternumSternum
B.B. 100 bones100 bones B.B. PhalangesPhalanges
C.C. 85 bones85 bones C.C. TibiaTibia
D.D. 206206 bonesbones D.D. PatellaPatella
2. What is the jelly substance inside a bone called?2. What is the jelly substance inside a bone called? 5. The legs are connected to5. The legs are connected to
whatwhat ??
A.A. CartilageCartilage A.A. The Hips (Pelvis)The Hips (Pelvis)
B.B. Bone MarrowBone Marrow BB.. SkullSkull
C.C. Compact BoneCompact Bone C.C. HandsHands
D.D. JointsJoints D.D. HeartHeart
3.What Bone protects the internal organs3.What Bone protects the internal organs BONUS QUESTION!!!BONUS QUESTION!!!
like the lungs and heart?like the lungs and heart? What joint is found in the ankle?What joint is found in the ankle?
A.A. The SpineThe Spine A.A. Pivot JointPivot Joint
B.B. The FemurThe Femur B.B. Gliding JointGliding Joint
C.C. The RibsThe Ribs C.C. Hinge JointHinge JointQuit
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