Perio means around, and dontal refers to teeth. Periodontal diseases are infections of the structures around the teeth, which include the gums, periodontal ligament and alveolar bone. In the earliest stage of periodontal disease â gingivitis â the infection affects the gums. In more severe forms of the disease, all of the tissues are involved. For many years scientists have been trying to figure out what causes periodontal disease. It is now well accepted that various types of bacteria in dental plaque are the major villains. Researchers also are learning more about how an infection in your gums can affect your overall health.
Elephants are large mammals of the family Elephantidae and the order Proboscidea. Three species are recognised, the African bush elephant (Loxodonta africana), the African forest elephant (L. cyclotis), and the Asian elephant (Elephas maximus). Elephants are scattered throughout sub-Saharan Africa, South Asia, and Southeast Asia. Elephantidae is the only surviving family of the order Proboscidea; other, now extinct, members of the order include deinotheres, gomphotheres, mammoths, and mastodons.
Confidence votes 71.8K. Elephants are found in large numbers in Africa and South Asia. They inhabit the Savannahs of Africa and the dense rain forests of South Asia. Their natural habitat usually surrounds abundant water sources like lakes and rivers.They also prefer habitats with lush green vegetation and trees which they forage on.African savannah elephants are found in 37 countries south of the  Sahara. African forest elephants inhabit the rainforests of  Africa.  Asian elephants are found in Ind â¦ ia, Sri Lanka, China, and Southeast  Asia.