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Notocord Heart Liver Gall bladder Intestine Pharynx Kidney Esophagus Gonads Velum Endostyle Myomeres Bile duct Atrium Ventricle Buccal funnel Oral papillae Pineal organ Lateral line system Gills Dorsal fins Caudal fin Tongue Cloaca Support structure typically lost in Vertebrates but is retained in the lamprey Large 2 chambered structure that moves blood through the body Single lobed triangular structure that makes bile that is used in digestion; green in color Thin cavity that connects the mouth to the esophagus; food passes through Structure that store bile Long narrow tube; both digestions and absorption of nutrients occurs here Structure responsible for controlling salt concentrations in the body Area located between the pharynx and the intestine; food passes through Flap of tissue near the pharynx that prevents the backflow of water from the gills Found only in the ammocoetes structure found on the floor of the pharynx; secretes mucous used to capture tiny food particles Structure that transports bile from the liver to the intestine; bile is used in digestion One of the chambers of the heart that holds oxygenated blood One of the chambers of the heart that pumps oxygenated blood Opening of the lamprey that lacks jaws; lined with oral papillae and contains horny teeth Tiny structures that line the buccal funnel; sensory in nature - act as a gasket to create a air tight seal when feeding Unpigmented patch of skin on the anterior dorsal region; biological clock able to detect light and seasonal changes Series of small pores on the side of the body lead to this structure; tiny pits that detect changes in water currents Structure used to remove oxygen from water; respiration - 7 pairs Located on the dorsal side of the body; used to keep the organism stable (upright) when swimming ; 2 Posterior end of the organism; this structure is used for propulsion Protrusible structure attached to the ventral surface of the mouth; used when feeding This ventral opening anterior to the tail; waste is removal Reproductive cells Female - eggs Male - sperm Muscles bundles often W-shaped