MOLLUSCS: Soft muscular body, Breathe by lungs or gills and are oviparous, Live on land or in water , 3 groups: gastropods, bivalves and cephalopods, Gastropods: have a head with tentacles, a foot for crawling, can have a shell and secrete mucus. Examples: snails , slugs. , Bivalves: have two valves and a hinge. Ex: clams and mussels, Cephalopods: have a bulky head with tentacles, expel an ink for catching the prey or running away from them. Ex: squids, octopuses, ECHINODERMS: Live in the sea, Have tentacles, Have spines, They are oviparous and breathe by lungs or gills, Example: starfish, sea urchins, PORIFERA: Have soft bodies , Live in water, Absorb oxygen through the pores, Reproduce by forming buds, Have no muscles, nervous system or circulatory system, Ex: sponges, CNIDARIANS: Have soft body , Can have tentacles, Live in the water, Reproduction: by forming buds, Absorb oxygen through their skin, Ex: jellyfish, coral, ANNELIDS: Soft, long, segmented bodies, Live in water or on land, Breathe by gills or lungs, They are oviparous or form buds, Example: worms, ARTHROPODS: Have jointed legs, Have an exoskeleton , Breathe by lungs or gills, They are oviparous, Live in water, on land, in the air or underground, 4 groups: arachnids, insects, crustaceans and myriapods, Arachnids: have two body parts (cephalothorax and abdomen), 8 legs, ex. scorpions, spiders, Insects: have three body parts (head, thorax and abdomen), 6 legs, 2-4 wings, 2 antennae, ex. bees, butterflies, Crustaceans: have two body parts (cephalothorax and abdomen),10 legs, 4 antennae, ex. crabs, lobsters, Myriapods: have more than 10 legs, 2 antennae, ex. centipedes, millipedes,

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