The dermis, the skin's next layer, is a thick layer of fibrous and elastic tissue (made mostly of collagen, with a small but important component of elastin) that gives the skin its flexibility and strength. The dermis contains nerve endings, sweat glands and oil (sebaceous) glands, hair follicles, and blood vessels.
âAll cancers are caused by genetic mutations, and in some cases we know the processes driving them, for example, tobacco smoking in lung cancer, however, our understanding of the causes of mutation in most cancers is remarkably limited,â Grimmond says.
While there was a chain of events that directly led to the fighting, the actual root causes are much deeper and part of continued debate and discussion. This list is an overview of the most popular reasons that are cited as the root causes of World War 1.mperialism is when a country increases their power and wealth by bringing additional territories under their control. Before World War 1, Africa and parts of Asia were points of contention amongst the European countries. This was especially true because of the raw materials these areas could provide.