Thus an athlete has more bone mass than an office

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Unformatted text preview: usly replaces itself, about 10% per year. • Bone mass is added if a person is active, and removed if a person becomes inactive. Thus an athlete has more bone mass than an office worker, and lifetime fitness is the best preventative of osteoporosis. • Muscles and bones together create movement. • Muscles are attached to bones by tendons; bones are attached to bones by ligaments. • Joints in the skeleton allow movement Notes Biology 103 Dr. Karen Bledsoe http://www.wou.edu/~bledsoek/ • Hinge joints: knee • Ball and socket joints: femur and pelvis • Gliding joint: vertebrae, wrist • Muscles work in antagonistic pairs • The flexor pulls one bone toward another. The biceps in the arm are flexors. • The ex...
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This document was uploaded on 02/25/2014 for the course BIOLOGY 103 at Western Oregon University.

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