Because the Earth is a three-dimensional sphere and not merely a two-dimensional flat, East-West surface. Because of this spherical shape, often times the shortest distance is flying more north and south, up over the Northern latitudes and the North Pole, rather than flying east/west over the Pacific.
1 Too few red blood cells (anemia). 2  Some people with Crohn's disease develop anemia because of low iron levels caused by bloody stools or the intestinal inflammation itself. A high fever may mean that you have an infection, such as an abscess. 2  Weight loss. 3  Ongoing symptoms, such as diarrhea, can lead to weight loss. 4  Too few red blood cells (anemia). 5  Some people with Crohn's disease develop anemia because of low iron levels caused by bloody stools or the intestinal inflammation itself.
Environmental factors may contribute to Crohn's disease in one of these two ways: 1  They may trigger an immune system response. Once started, the response cannot stop. 2  They may directly damage the lining of the intestines. This may cause Crohn's disease to begin or to speed up.