1 This drug may have the effect of speeding up your heart rate. 2  I worry about the effect that violent movies may have on children. 3  Certain chemicals have been banned because of their damaging effect on the environment.  It's important to protect your skin from the harmful effects of the sun.
The CSF from all theses sources , as well as any formed in the central canal of the spinal cord, escapes from the fourth ventricle into the subarachnoid space through the median aperture (of Magendie) and lateral aperture (of Luschka).
Winds tend to flow down a pressure gradient from high pres-sure to low pressure, just as water flows down a slope from a high point to a low one. A useful little rhyme, âWinds always blow, from high to low,â will always remind you of the direction of sur-face winds.