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Bones and Muscles

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am norton

on 25 April 2012

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Transcript of Bones and Muscles

skeleton diagram An adult human has 270 bones Four kinds of joints are ball and socket, hinge, sliding, and the gliding joint. Joints help you move your body parts Each bone in the human body is able to move by having the muscles pull on it. Muscles each have a certain function but the most important muscle is the heart. The heart is the most important muscle in the body because it pumps blood throughout your body. In the diagram in the previous slide you can see the main muscles in the body. The biceps are in your body for motion. They allow the bones to move. Without these muscles we would not be able to move. The biceps contract and pull the lower arm up giving you movement.

The triceps are muscles the extend the elbow. They reside on the back side of the upper arm and when they contract, it straightens the arm thus extending the elbow joint. They also have medial and lateral heads.

Skeleton System all the bones in the body; forms an internal, living framework, that proides shape and support, protects internal organs, moves bones, forms blood cells, and stores calcium and phosporous compounds for later use
Periosteumtough, tight fitting membrane that covers a bone's surface and contains blood vessels that transport nutrients into the bone
Cartilage tough, flexible tissue that joins vertebrae and makes up or part of the vertebrae endoskeleton, in humans thick, smooth, flexible and slippery tissue layer that covers the ends of the bones, makes movement easier by reducing fritcio, and absorbing shock
Ligament tough band of tissue that holds bones together at joints
organ that can relax, contract, and provide the force to move bones and body parts
Voluntary Muscle
muscle, such as leg or arm muscle, that can be consciously controlled
Involuntary Musclemuscle, such as heart muscle, that cannot be consiously controlled
thick band of tissue that attaches bones to muscle
Cardiac Muscle
Striated, involuntary muscle found only in the heart
Smooth Muscleinvoluntary, nonstriated, muscle that controls movement of internal organs
Epidermisout, thickest, skin layer that constantly produces new cells to replace the dead cells rubbed of its surface
skin layer below the epidermis that contains blood vessles, nerves, oil and sweat glands, and other structures
pigment produced by the epiderms that protects skin from sun damage and gives skin and eyes their color
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