Dental Specialties in US. The American Dental Association recognizes nine dental specialties in which dentists can get additional training and practice in addition to or instead of general dentistry: 1  Dental public health-Study of dental epidemiology and social health policies.
Trichinella spiralis is a parasitic worm that causes the disease Trichinosis. A whipworm is a roundworm that infects the large intestine. Whipworms are found commonly in pork and are often called pork-worms. They are also found in rats, humans, dogs and cats.
Echinoderms are species that belong to the phylum Echinodermata. The phylum contains about 6000 species. Echinoderms get its name from the Greek word which means Spiny Skin, But not all the Echinoderms have spiny skin.