Chapter 46 Movement

Chapter 46 Movement - Chapter 46 MOVEMENT Locomotion...

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Chapter 46 MOVEMENT Locomotion Movement *Movement in complex organisms includes beating of the heart, contraction of the digestive organs, etc. Locomotion is the movement of the entire body. *Locomotion occurs because of the coordinated activities of the skeletal, muscular, nervous, circulatory and etc. systems. Vertebrate Skeleton *Skeletal system functions: *Support *Protection *Lever system against which muscles pull. *2 sections: *Axial *Appendicular *Flexibility of the vertebrate skeleton is achieved by joints . Muscles Move Bones at Joints *3 types of joints, fig 46.17 *Sutures *Cartilagenous *Synovial joints Skeletal Muscles *Function: movement *Attached to bones by tendons *Attachment to the bone that does not move = origin . *Attachment to the bone that moves = insertion . *Muscles move bones by contracting or shortening. *Actions *Muscles that work together to perform the same action are synergists (muscles of the quadriceps). *Muscle that cause opposite actions are called antagonists
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This note was uploaded on 09/08/2011 for the course BIOL 1403 taught by Professor Dini during the Fall '09 term at Texas Tech.

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Chapter 46 Movement - Chapter 46 MOVEMENT Locomotion...

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