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.
In physics, position is usually a number on an axis. You can have an x-axis that looks like this. Or a y-axis, like this. If you drew these axes on the floor of a room, and then moved to a random place in that room, you would have a position in both the x and y directions.