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The Muscular System

Essential terms and definitions of the muscular system.
a data set by ms_thompson
created April 24, 2017
Muscular systemThe organ system that allows the body to move, maintain its posture, and circulate blood.
MuscleA band of fibrous tissue that can contract or relax in order to move or maintain the position of a certain body part.
TendonTough, cord-like tissues that connect muscles to bones
Skeletal muscleA muscle that is connected to a bone and helps with mechanical movement.
Smooth muscleInvoluntary muscles lining the walls of blood vessels, visceral organs, and attached to hairs in the skin
Cardiac muscleMuscle found in the walls of the heart; also involuntary
Motor cortexThe part of the cerebral cortex in the brain that uses nerve impulses to initiate voluntary muscle activity
CerbellumThe part of the brain that coordinates and regulates muscle activity
FlexorA muscle whose contraction bends a part of the body
ExtensorA muscle whose contraction straightens a part of the body
Fibrous jointA joint made up of fibrous tissue that does not allow for movement; ex. between plates of the skull
Cartilaginous jointA partially movable joint that is linked by cartilage; ex. joints in the spine
Synovial jointsA freely movable joint that allows for many different types of movement; filled with synovial fluid to help lubricate movement
Hinge jointA synovial joint that allows for movement in one direction; ex. the knees
Pivot jointA synovial joint that allows for a twisting motion; ex. the neck
Ball-and-socket jointsA synovial joint in which the end of a long bone fits into the hollow of another bone; ex. the shoulders
ArthiritusInflammation and stiffness of the joints
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