Causes of Throat clearing: The following medical conditions are some of the possible causes of Throat clearing. There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Habitual throat clearing. 2  Dry throat - see also causes of dry throat.  Anxiety.
Spinning can enhance cardiovascular fitness, and improve muscle tone and exercise endurance. Spinning works various muscle groups, including the quadriceps, hamstrings, calves, hips, and abdominal muscles.
Best Answer: Those spinning devices are called centrifuges, and they are used to separate the blood into its component parts so that tests can be performed on that component alone. The denser materials (like red blood cells) sink to the bottom, while the lighter ones (like plasma) float to the top.