What is an Ecosystem? An ecosystem includes all of the living things (plants, animals and organisms) in a given area, interacting with each other, and also with their non-living environments (weather, earth, sun, soil, climate, atmosphere). In an ecosystem, each organism has its own niche or role to play.
Pemphigus is a group of rare skin disorders that cause blisters and sores on the skin or mucous membranes, such as in the mouth or on the genitals. The two main types are pemphigus vulgaris and pemphigus foliaceus. Pemphigus vulgaris usually starts in your mouth.
Types of Tobacco. Several different forms of tobacco are widely used in the United States. Cigarettes, smokeless tobacco, and cigars are the most common types of tobacco. Hookah, a less common form of tobacco, has recently become increasingly popular. Check out the following links to find out more about these different forms of tobacco and the harmful effects associated with each type. 1  Cigarettes.