1. Animal Taxonomy

3. Kingdom: Animalia Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Triploblastica Division: Triploblastica Sbdivision: Sbdivision: coelomates Phylum: Mollusca Gastropoda 1-Class: Gastropoda snails Example: snails

4. Mollusca includes snails and slugs, octopuses and squids. Most mollusks are marine, though some inhabit fresh water, and some snails and slugs live on land. Mollusks are soft-bodied animals, but most are protected by a hard shell of calcium carbonate. All mollusks have a muscular foot for locomotion, a visceral mass with most of the internal organs, and a mantle. Most mollusks have separate sexes, with gonads located in the visceral mass, and some are hermaphrodites. Phylum: Mollusca

5. Most Gastropoda are marine, but there are also many freshwater species. The anus and mantle cavity are above the head in adults. Gastropoda 1-Class: Gastropoda snails Example: snails

6. Most gastropods are protected by a spiraled shell. Other species have lost their shells entirely and may have chemical defenses against predators. Many gastropods have distinct heads with eyes at the tips of tentacles. They move by their foot. Some species are predators.

7. Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Triploblastica Division: Triploblastica Sbdivision: Sbdivision: coelomates Phylum: Mollusca 2- Class: Cephalopoda Example: Octopus Kingdom: Animalia

8. The foot of a cephalopod (“head foot”) has been modified into the muscular siphon and parts of the tentacles Most octopuses live on the seafloor. Cephalopods have an active, predaceous lifestyle. They have a well- developed nervous system with a complex brain and well- developed sense organs. Cephalopods use rapid movements toward their prey which they capture with several long tentacles. A mantle covers the visceral mass, but the shell is reduced and internal in squids missing in many octopuses. 2- Class: Cephalopoda Example: Octopus

9. Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Triploblastica Division: Triploblastica Sbdivision: Sbdivision: coelomates Phylum: Annelida Class: Oligochaeta Genus: Allolobophora (Earthworm) Species: caliginosa Allolobophora caliginosa Kingdom: Animalia

10. All annelids (“little rings”) have segmented bodies. Annelids live in the sea, most freshwater habitats, and damp soil. The coelom of the earthworm, a typical annelid, is partitioned by septa, but the digestive tract, longitudinal blood vessels, and nerve cords penetrate the septa and run the animal’s length. Most annelids, including earthworms, burrow in sand and silt.

11. The digestive system consists of a pharynx ء, an esophagus, crop, gizzard and intestine The closed circulatory system carries blood with oxygen-carrying hemoglobin through dorsal and ventral vessels connected by segmental vessels.

12. In each segment is a pair of excretory tubes, metanephridia, that remove wastes from the blood and coelomic fluid. Earthworms are cross-fertilizing hermaphrodites. Some earthworms can also reproduce asexually by fragmentation followed by regeneration.

13. Systematic Position Kingdom: Animalia Subkingdom: Eumetazoa Triploblastica Division: Triploblastica Sbdivision: Sbdivision: pseudocoelomates Phylum: Nematoda (Roundworms) Class: Class: Rhalditea Order: Order: Ascariida Family: Ascariidae Genus: Genus: Ascaris Species: Species: lumbricoides Ascaris lumbricoides Kingdom: Animalia

14. Roundworms are found in most aquatic habitats, wet soil, moist tissues of plants, and the body fluids and tissues of animals. Some species parasitize animals. They range in length from less than 1 mm to more than a meter. The body of Nematode is covered with a tough exoskeleton, the cuticle. They have a complete digestive tract. Nematodes usually engage in sexual reproduction. Roundworms are pseudocoelomates covered by tough cuticles Ascaris

15. The Summary