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.
What is physics? The dictionary definition of physics is âthe study of matter, energy, and the interaction between themâ, but what that really means is that physics is about asking fundamental questions and trying to answer them by observing and experimenting. Physicists ask really big questions like: How did the universe begin?