Circulatory System: Facts, Function & Diseases. The circulatory system is a vast network of organs and vessels that is responsible for the flow of blood, nutrients, hormones, oxygen and other gases to and from cells.
And I must make one more important point about all this maximum benefit business. I just said that the maximum Social Security benefit this year is $2,663. But there are many people getting more than that.
Working backwards from these figures, we can arrive at the maximum Social Security tax liability for any given year. For 2014, the most that a non-self-employed person had to pay was $7,254. You get this by multiplying $117,000 (the 2014 taxable maximum) by 6.2% (an employee's share of Social Security taxes). For 2015, the figure is $7,347 ($118,500 times 6.2%).