All Direct Subsidized and Unsubsidized Loans disbursed between July 1, 2014 and June 30, 2015 carry a fixed interest rate of 4.66% for undergraduates. Graduate or professional students receiving a Direct Unsubsidized Loan disbursed between July 1, 2014 and June 30, 2015 will have a fixed interest rate of 6.21%.
There is a problem when the valve that controls what blood is good and what blood is used, no longer is strong enough to control this flow. Heart valves get damaged or simply wear out. I think you are asking what causes blood to flow in the wrong direction. My guess is that it would be a faulty heart valve.
Confidence votes 393. The cardiac muscle in the heart is the musculature responsible for contracting the heart and thereby causing blood flow. What the first answerer to this question wrote is more or less entirely inaccurate, especially the parts concerning proper blood-flow through the heart.onfidence votes 393. The cardiac muscle in the heart is the musculature responsible for contracting the heart and thereby causing blood flow. What the first answerer to this question wrote is more or less entirely inaccurate, especially the parts concerning proper blood-flow through the heart.