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.
Echinodermata is the largest phylum that does not have any of its organisms living on land or in fresh water. The most common Echinoderms are starfish, sea cucumbers, sea urchins, and sand dollars. The name literally means, in Greek, spiny skinned, because that's what echinoderms look like.