Members of this phylum have long flattened bodies that allow for simple diffusion of gases, and other substances. This phylum includes all flatworms
Phylum Platyhelminthes
Members of this phylum have long cylindrical bodies that are unsegmented. members of this phylum include hookworms heart worms, and pinworms
Phylum Nematoda
Members of this phylum are the segmented worms of which we are the most familiar . Members of this phylum have a well developed digestive system that consists of a mouth, pharynx, crop, gizzard, and intestine 
Phylum annelida
Members of this order are the most primitive mammals. there are only two species in this order: a spiny ant eater and the platypus 
Order monotrema
Animals in this order are well known for their pouch. Animals in this order may include kangaroos, koalas, opossums, and Tasmanian devils 
Order marsupialia
Members in this order or characterized by elongated canine teeth. this order is divided into two distinct claims, felines and canines.
Order Carnivora
Members of this order are hooved animals that have an even number of toes or bear their weight upon only two toes. Examples of animals in this order are cows, hippos, pigs, and camels. 
Order artiodactyla
Members of this order are hoofed animals that bear their weight on either one or three toes. These animals also digest cellulose within an expanded area of the intestine rather than the stomach. Examples of animals in this order are to tapirs and rhinoceroses. 
Order perissodactyla
Members of this order are completely aquatic animals with forelimbs adapted for swimming and no hindlimbs. Animals in this order include whales, dolphins, and orcas.
Order cetacea
Animals in this order possess forelimbs adapted as wings with a thin membrane called a patagium. They’re the only mammals that can actually fly.
Order chiroptera
Animals in this order are characterized by a pair of enlarged incisor teeth in each jaw that never stop growing and must be constantly worn down 
Order rodentia
Animals in this order are similar to rodents. Their teeth also never stop growing, but they also have hair covering the bottom of their feet. Animals in this order may include rabbits, hares and pikas
Order lagomorpha
Animals in this order have a large cerebrum to body ratio, color vision, eyes on the front of their face, and dexterous hands. Animals in this order include monkeys, apes, lemurs, baboons, and humans. 
Order primates
