Bones & Muscles. How many bones does the human skeleton contain?

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Transcript of Bones & Muscles. How many bones does the human skeleton contain?

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Bones & Muscles Slide 2 Slide 3 How many bones does the human skeleton contain? Slide 4 206 Slide 5 Functions of the skeletal system Give shape & support Protect internal organs Moves muscles Form blood cells Store calcium and phosphorous Slide 6 Periosteum: soft, thin, covers and protects the bone Compact Bone: Hard, outer surface. Can heal itself when broken Spongy Bone: Porous, contains blood vessels, nerves Marrow: manufactures red blood cells Bone Cross Section Slide 7 Slide 8 Slide 9 Skeletal System is divided into two parts Slide 10 Axial Skeleton Skull (protects the brain). Ribs ( protect lungs, and heart). Spinal column (houses and protects the spinal cord). Slide 11 Appendicular Skeleton Legs Pelvis Arms Shoulders Slide 12 Types of Joints Immovable Skull Pelvis Moveable Pivot Ball & socket Hinge Gliding Slide 13 http://www.nhfyouthworld.org/junior/mayjun/skeleton.jpg Slide 14 Types of Joints Ball and Socket Joint Bone with a rounded end that fits into a cuplike cavity on another bone http://www.shockfamily.net/skeleton/JOINTS.HTML Slide 15 Ball & Socket: Shoulders and Hips Allows arms and hips to move in any direction Can move in a full 360 degrees Slide 16 Types of Joints Pivot Joint One bone rotates in a ring of another bone that does not move http://www.funhousefilms.com/b-pivot2.jpg Slide 17 Pivot Joints: First two neck vertebrae & joint beneath elbow Moves in a semicircle motion by twisting against each other Slide 18 Types of Joints http://www.shockfamily.net/skeleton/JOINTS.HTML Hinge Joint Back-and- forth movement like hinges on a door Slide 19 Hinged: Elbows & Knees Move like hinges on a door Limited movement Can only swing back and forth Slide 20 Type of Joints http://www.shockfamily.net/skeleton/JOINTS.HTML Gliding Joint One part of a bone slides over another bone Slide 21 Gliding Joints: Spine, Wrists, Ankles Slide against each other in a gliding motion Gives your wrists and ankles lots of freedom Slide 22 Immoveable joints are located in the skull and pelvis. Slide 23 http://www.lifesci.utexas.edu/faculty/sjasper/images/john21.19.jpg Slide 24 http://www.bio.psu.edu/ Slide 25 http://www.bmb.psu.edu/courses/bisci004a/tissues/skeletal.jpg Slide 26 http://www.bio.psu.edu/ Slide 27 http://www.sc.edu/union/Sears/AnimalTissue/im.tissue Cardiac.jpg Slide 28 http://www.bio.psu.edu/ Slide 29 http://www.bmb.psu.edu Slide 30 How do muscles work Slide 31 http://www.sirinet.net/~jgjohnso/ muscle.html Slide 32 Muscle Fiber Muscle Myofibril Inside a Muscle Slide 33 http://www.cytochemistry.net/microanatomy/muscle/smooth1.jpg