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Earthworm Clam Starfish Crayfish Phylum Class Backbone ? Blastula? Coelom Annelida Oligochaeta Invertebrate protostomes Eucoelom Mollusca Bivalvia Invertebrate protostomes Eucoelom Echinodermata Asteroidea Invertebrate DEUTEROSTOMES Eucoelom Arthropoda Crustacea Invertebrate protosomes Eucoelom Digestive system Pharynx, crop, Gizzard, Intestine w/TYPHLOSOLE absorbs nutrients & removes digestive waste Stomach; digestive gland-makes BILE & absorbs nutrients; intestine removes digestive waste Pyloric & cardiac stomach; digestive gland makes BILE & absorbs nutrients; NO intestine Respiratory system Exchange gases through moist skin Gills exchange gases Circulatory system CLOSED; Dorsal aortic arches pump blood in vessels OPEN; Dorsal Heart w/pericardial cavity; hemolymph circulates in coelom/tissues Skin gills & surface of tube feet exchange gases OPEN; no heart; Hemolymph circulates in coelom/tissues Pyloric & cardiac stomach w/ GASTRIC MILL; digestive gland makes BILE & absorbs nutrients; intestine absorbs nutrients/ removes digestive waste Gills exchange gases Excretory system Nephridia remove urea through pores in skin Kidney empties urea into mantle cavity NO excretory organs; Nitrogen waste leaves through skin gills & surface of tube feet Reproductive system Hermaphrodites trade with partner; Sexual reproduction; External fertilization; Direct development 2 sexes; ASEXUAL & Sexual reproduction External fertilization; INDIRECT development w/ BIPINNARIA larva Nervous system CEPHALIZATION; 1 pair cerebral ganglia; Ventral nerve cord; multiple ganglia along body No bones; Fluid in coelom acts as hydrostatic skeleton; Circular/longitudinal muscles in skin move worm 2 sexes; Sexual reproduction Internal OR external fertilization (depends on where live); INDIRECT development w/ TROCHOPHORE larva NO CEPHALIZATION Ventral; 3 pair ganglia; 2 pair nerve cords No bones; Protective shell w/ calcium carbonate secreted by mantle; Adductor muscles open/close shell; Muscles in foot move clam Only mollusks W/O a radula; filter feeders; adults SESSILE; Siphons move water in/out of mantle cavity; ENDOSKELETON made of calcium carbonate OSSICLES; Water vascular system moves tube feet Skeletal/ muscular OTHER Segmented body; Clitellum makes mucous for reproduction; young hatch from cocoons; Can regenerate tail/not whole animal NO CEPHALIZATION Multiple ganglia connect nerve ring w/ radial nerves in arms; All are MARINE; REGENERATION of parts or whole animal; Only animals w/ water vascular system, tube feet, & ossicles OPEN; Dorsal heart w/ OSTIA; Arteries LEAVE heart but NO veins to RETURN; Hemolymph circulates in coelom/tissues GREEN GLAND removes AMMONIA & excess water through pores near antennae; Gills help remove ammonia 2 sexes; Sexual reproduction; External fertilization; INDIRECT development w/ NAUPLIUS larva; eggs/larva carried on swimmerets CEPHALIZATION; 1 pair Cerebral ganglia; Ventral nerve cord; multiple ganglia along body EXOSKELETON of proteins, lipids, chitin, calcium carbonate; Muscles move body & appendages Segmented body; Jointed appendages; Can REGENERATE lost appendages/not whole animal; MOLTING replaces exoskeleton; ENDOCRINE system controls molting, heart rate, sexual development INVERTEBRATE ANIMAL COMPARISONS Earthworm Clam Starfish Crayfish Phylum Class Backbone ? Blastula? Coelom Annelida Oligochaeta Invertebrate protostomes Eucoelom Mollusca Bivalvia Invertebrate protostomes Eucoelom Echinodermata Asteroidea Invertebrate DEUTEROSTOMES Eucoelom Arthropoda Crustacea Invertebrate protosomes Eucoelom Digestive system Pharynx, crop, Gizzard, Intestine w/TYPHLOSOLE absorbs nutrients & removes digestive waste Stomach; digestive gland-makes BILE & absorbs nutrients; intestine removes digestive waste Pyloric & cardiac stomach; digestive gland makes BILE & absorbs nutrients; NO intestine Respiratory system Exchange gases through moist skin Gills exchange gases Circulatory system CLOSED; Dorsal aortic arches pump blood in vessels OPEN; Dorsal Heart w/pericardial cavity; hemolymph circulates in coelom/tissues Skin gills & surface of tube feet exchange gases OPEN; no heart; Hemolymph circulates in coelom/tissues Pyloric & cardiac stomach w/ GASTRIC MILL; digestive gland makes BILE & absorbs nutrients; intestine absorbs nutrients/ removes digestive waste Gills exchange gases Excretory system Nephridia remove urea through pores in skin Kidney empties urea into mantle cavity NO excretory organs; Nitrogen waste leaves through skin gills & surface of tube feet Reproductive system Hermaphrodites trade with partner; Sexual reproduction; External fertilization; Direct development 2 sexes; ASEXUAL & Sexual reproduction External fertilization; INDIRECT development w/ BIPINNARIA larva Nervous system CEPHALIZATION; 1 pair cerebral ganglia; Ventral nerve cord; multiple ganglia along body No bones; Fluid in coelom acts as hydrostatic skeleton; Circular/longitudinal muscles in skin move worm 2 sexes; Sexual reproduction Internal OR external fertilization (depends on where live); INDIRECT development w/ TROCHOPHORE larva NO CEPHALIZATION Ventral; 3 pair ganglia; 2 pair nerve cords No bones; Protective shell w/ calcium carbonate secreted by mantle; Adductor muscles open/close shell; Muscles in foot move clam Only mollusks W/O a radula; filter feeders; adults SESSILE; Siphons move water in/out of mantle cavity; ENDOSKELETON made of calcium carbonate OSSICLES; Water vascular system moves tube feet Skeletal/ muscular OTHER Segmented body; Clitellum makes mucous for reproduction; young hatch from cocoons; Can regenerate tail/not whole animal NO CEPHALIZATION Multiple ganglia connect nerve ring w/ radial nerves in arms; All are MARINE; REGENERATION of parts or whole animal; Only animals w/ water vascular system, tube feet, & ossicles OPEN; Dorsal heart w/ OSTIA; Arteries LEAVE heart but NO veins to RETURN; Hemolymph circulates in coelom/tissues GREEN GLAND removes AMMONIA & excess water through pores near antennae; Gills help remove ammonia 2 sexes; Sexual reproduction; External fertilization; INDIRECT development w/ NAUPLIUS larva; eggs/larva carried on swimmerets CEPHALIZATION; 1 pair Cerebral ganglia; Ventral nerve cord; multiple ganglia along body EXOSKELETON of proteins, lipids, chitin, calcium carbonate; Muscles move body & appendages Segmented body; Jointed appendages; Can REGENERATE lost appendages/not whole animal; MOLTING replaces exoskeleton; ENDOCRINE system controls molting, heart rate, sexual development VERTEBRATE ANIMAL COMPARISONS Fish Phylum Subphylym Class Backbone ? Blastula? Coelom Chordata Vertebrata Osteichthyes Vertebrate deuterostomes Eucoelom Digestive system Pharynx, esophagus, Stomach (pyloric/cardiac), pyloric caeca contain bacteria to digest plants, Intestine, w/ VILLI absorbs nutrients & removes digestive waste; LIVER makes bile; stores vitamins & glycogen, processes toxins for kidneys; Pancreas makes trypsin; GALL BLADDER stores bile; Exchange gases through GILLS CLOSED; 2 chamber (1Atrium: 1 Ventricle), 1 loop system; conus arteriosus & sinus venosus; SPLEEN-blood cell factory; Heart carries ONLY LOW oxygen blood Gills remove ammonia/osmoregulation; Kidneys excrete, urinary bladder stores, exits via urogenital pore Separate sexes; Sexual reproduction; External fertilization; Direct development Share urogential pore with excretory system; eggs lack shells and multicellular membranes CEPHALIZATION; Dorsal nerve cord surrounded by vertebrae; CRANIUM protects brain; Multi lobed brain; Olfactory, cerebrum, optic tectum, cerebellum, medulla oblongata Endoskeleton made of bones; muscles move body PANCREAS-regulates blood sugar (insulin/glucagon) Respiratory system Circulatory system Excretory system Reproductive system Nervous system Skeletal/ muscular Endocrine