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What are muscles?

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Congenital muscle abnormalities: some people are born with muscles or groups of muscles that are not properly developed. This can be an isolated problem or part of a syndrome. Muscle weakness: problems with the nervous system can mean that messages are not transmitted effectively between the brain and the muscles. read more

Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin 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 motion. read more

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Muscles Of The Back | Search Results | Calendar 2015
Source: calendariu.com

Quote

What is wrong with looking muscular? Muscles are beautiful. Strength is beautiful. Muscle tissue is beautiful. It is metabolically, medically, and philosophically beautiful. Muscles retreat when they're not used, but they will always come back if you give them good reason. No matter how old you get, your muscles never lose hope. Few cells of the body are as capable as muscle cells are of change and reformation, of achievement and transcendence.
Source: quotemaster.org