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, the motion of a projectile can be broken down into two components: horizontal and vertical. In most cases, the vertical component is the motion caused by gravity acting on the object. For every object, gravity causes a constant acceleration towards the Earth at a rate of 32.2 ft/s 2, or 9.8 m/s 2. Horizontal motion is the movement of a projectile across a horizontal plane based on the force acting on it.