The muscular system. The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction. Exceptions to this are the action of cilia, the flagellum on sperm cells, and amoeboid movement of some white blood cells. The muscular system in vertebrates consists of three different types of muscles: cardiac, skeletal and smooth.
Welfare Statistics by Race, State and Payment. There are approximately 12.8 million Americans on welfare, accounting for 4.1% of the US population. An estimated $131.9 billion is spent by the government on welfare each year. The following percentages are recipients of welfare based on race. â¢ White â 38.8%.
Census figures show more than one-third of Americans receiving welfare benefits. Fifty years after the âwar on povertyâ was first waged, there are signs a new offensive is needed. Newly released Census data reveals nearly 110 million Americans â more than one-third of the country â are receiving government assistance of some kind. The number counts people receiving what are known as âmeans-testedâ federal benefits, or subsidies based on income.