Ischemia is the medical term for what happens when your heart muscle doesn't get enough oxygen. Ischemia usually happens because of a shortage of blood and oxygen to the heart muscle.It is usually caused by a narrowing or blockage of one or more of the coronary arteries (which supply blood to the heart muscle).schemia is the medical term for what happens when your heart muscle doesn't get enough oxygen. Ischemia usually happens because of a shortage of blood and oxygen to the heart muscle.
The slug is a unit of mass associated with Imperial units and United States customary units. It is a mass that accelerates by 1 ft/s 2 when a force of one pound (lbF) is exerted on it.
Slugs live on land and in saltwater, and one genus, Acochlidium, lives in freshwater. The unadorned word slug, however, is applied primarily to land slugs, whereas slugs from the sea or from fresh water are usually referred to as  sea slugs  or freshwater slugs.