1 If a lot of blood leaks out, it can cause a buildup of pressure in the brain because the brain is enclosed in the skull. There is no room for brain tissue to expand, and so the leaked blood can compress and kill important areas of the brain.  Hemorrhagic strokes tend to be more serious than ischemic strokes.
Horizontal definition, at right angles to the vertical; parallel to level ground. See more.
Best Answer: Horizontal and vertical are simply directions relative to some reference frame. Typically the reference frame in HS and early college physics is Earth's surface.In which case horizontal means parallel to Earth's surface and vertical means perpendicular to Earth's surface.In advanced math and physics, the terms horizontal and vertical will be replaced by unit vectors i, j, and k; where i dot i = 1 etc.nd Ay = A, which means the A vector is pointing straight up the vertical axis. In this case, there is no Ax component. In higher trig you will learn about transformations where we rotate the axes some degrees with the result sometimes of simplifying an otherwise difficult problem.