The Skeletal SystemThe Skeletal System

The Skeletal System The 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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What is a Bone?What is a Bone?

The skeletal system is made up of the bones The skeletal system is made up of the bones and cartilage that forms the framework of your and cartilage that forms the framework of your body.body.

We have bones so that we are not a puddle of We 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

The Inside of a BoneThe Inside of a Bone A bone is made up of salts, water, and A bone is made up of salts, water, and

tissue. tissue. Inside a bone there is a jelly substance Inside a bone there is a jelly substance

called bone marrow.called bone marrow. Bone marrow produces blood cells for the Bone marrow produces blood cells for the

body. body.

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Four Main jobs of a Bone:Four Main jobs of a Bone:1.1. To protect your body and To protect your body and

give it shape.give it shape.2.2. To protect your internal To protect your internal

organs.organs.3.3. To provide a scaffolding for To provide a scaffolding for

your muscles, allowing you your muscles, allowing you to move.to move.

4.4. To store minerals and To store minerals and make blood cells.make blood cells.

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The SpineThe Spine The spine is the central support for The spine is the central support for

the body. the body. The spine is made up of separate The spine is made up of separate

bones called vertebrae.bones called vertebrae. Between each vertebrae is Between each vertebrae is

cartilage which keeps bones from cartilage which keeps bones from rubbing against each other. rubbing against each other.

FUN FACT: there are 26 vertebrae FUN FACT: there are 26 vertebrae in the human body.in the human body.

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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. It 24 ribs and a breastbone in three parts. It protects your heart and lungs from knocks protects your heart and lungs from knocks and bumps.”and bumps.”

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Hands and FeetHands and Feet

The bones in your hands and feet are VERY The 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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Hips and LegsHips and Legs

The hip bone helps us to The hip bone helps us to stand upright and move. stand upright and move.

The main bones of the The main bones of the legs are the tibia, fibia, legs are the tibia, fibia, and femur. and femur.

The patella (kneecap) is The patella (kneecap) is also important!also important!

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ArmsArms The bones in the arm are The bones in the arm are

very flexible.very flexible. The three bones that make The 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 the The two bones that form the shoulder are the clavicle and shoulder are the clavicle and the scapula. the scapula.

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JointsJointsThe Pivot Joint Hinge JointThe Pivot Joint Hinge Joint

The Gliding Joint Ball-and-socket The Gliding Joint Ball-and-socket JointJoint

View More on Joints!

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Joints Movie!Joints Movie! Click on the link to watch a movie about Click on the link to watch a movie about

the different joints. the different joints.

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http://youtu.be/woUFwL1Ry5A

QuizQuiz1.1. How many bones are in an adult? 4. What is another name for How many bones are in an adult? 4. What is another name for

kneecap?kneecap?A.A. 342342 bones bones AA. . SternumSternumB.B. 100 bones100 bones B. B. PhalangesPhalangesC.C. 85 bones85 bones C. C. TibiaTibiaD.D. 206206 bones bones 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 to 5. The legs are connected to whatwhat ??

A.A. CartilageCartilage A. A. The Hips (Pelvis)The Hips (Pelvis)B.B. Bone MarrowBone Marrow BB. . SkullSkullC.C. Compact BoneCompact Bone C. C. HandsHandsD.D. JointsJoints D. D. HeartHeart

3.What Bone protects the internal organs 3.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 JointB.B. The FemurThe Femur B.B. Gliding JointGliding JointC.C. The RibsThe Ribs C.C. Hinge JointHinge JointD.D. PelvisPelvis D.D. Ball-and-socket JointBall-and-socket Joint

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Please Try Again!Please Try Again!

You’re RightYou’re RightGreat Job!Great Job!

ReferencesReferences Great Source Education Group. Great Source Education Group. Science Saurus: A Science Saurus: A

Student Handbook. Student Handbook. Wilmington: Great Source Wilmington: Great Source Education Group, 2006. Education Group, 2006.

http://library.thinkquest.org/5777/ske1.htmhttp://library.thinkquest.org/5777/ske1.htm http://www.mnsu.edu/emuseum/biology/humananatomy/skeletal/skeletalsystem.htmlhttp://www.mnsu.edu/emuseum/biology/humananatomy/skeletal/skeletalsystem.html http://www.dhmc.org/dhmc-internet-http://www.dhmc.org/dhmc-internet-

upload/file_collection/ms.web.ms5347.xray.jpgupload/file_collection/ms.web.ms5347.xray.jpg www.unitedstreaming.comwww.unitedstreaming.com http://services.epnet.com/getimage.aspx?http://services.epnet.com/getimage.aspx?

imageiid=4695imageiid=4695

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Concept MapConcept Map

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