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.
General Biology/Classification of Living Things/Eukaryotes/Animals/Phyla - Phylum Echinodermata. 1  Name means spiny skin. 2  This phylum consists of sea stars, brittle stars, sea urchins, and sea cucumbers. 3  Echinoderms are mostly sessile or very slow moving animals.