Cancer is the second leading cause of death in the world. According to the American Cancer Society, about 1.5 million cases will be determined with cancer in the world. A рак легких tumor is neither the reason of progressive destruction nor does it actually lead to the death of the body. Cancer cells, like all other cells, know that if the body dies, they will destroy as well.
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon),elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image. One type of commonly known gas is steam.