Muscles
Muscle is a soft tissue of animals. Muscle cells contain protein filaments that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and cause motion. They are primarily responsible for maintenance of and changes in posture, locomotion of the organism itself, as well as movement of internal organs, such as the contraction of the heart and movement of food through the digestive system via peristalsis.
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Famous quotes containing the word muscles:
“Light
Flashed from his matted head and marble feet,
He grappled at the net
With the coiled, hurdling muscles of his thighs:
The corpse was bloodless, a botch of reds and whites,”
—Robert Lowell (1917–1977)
“As the strong man exults in his physical ability, delighting in such exercises as call his muscles into action, so glories the analyst in that moral activity which disentangles.”
—Edgar Allan Poe (1809–1845)
“The indispensable ingredient of any game worth its salt is that the children themselves play it and, if not its sole authors, share in its creation. Watching TV’s ersatz battles is not the same thing at all. Children act out their emotions, they don’t talk them out and they don’t watch them out. Their imagination and their muscles need each other.”
—Leontine Young (20th century)