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| vertebral column, cranium, endoskeleton, most have streamlined shape, fins, gills, lateral line. |
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| rough tongue used to pinch off fish off another fish. burrows into dead fish and eat internal body parts |
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| disk shaped mouth with circular rows of teeth attached to a host and feed on its blood. |
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| supporting rod that in most animals develops into the backbone |
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| scales found on the external body of sharks |
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| in most animals, this structure develops into the spinal cord. |
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| lack opperculums and have a cartilage skeleton |
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| sharks, teeth structure depends on species and feeding habits. |
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| found in the brain and are used to analyze smell. |
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| removes excess sodium and chloride ions from the blood |
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| reproductive fins on male sharks that transfer sperm into female's body. |
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| paired structure in the throat that can develop into gills |
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| a strong rod, that replaces the notochord in the back. |
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| strong bony structure that supports, protects, and is a place where muscles attach |
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| filter-feeders that are commonly called seasquirts |
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| fish-like creature that lives on the sand ocean floor. |
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| biologist believed that the appendages could later be used to climb on land |
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| hard plate that opens at the rear and covers and protects the gills. |
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| navigating, below and behind the head |
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| stop/slow fish down, side of head. |
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| system that allows a higher level of oxygen diffusion |
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| organ that regulates gas for buoyancy in a fish |
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| a row of sensory pores that detect vibrations in the water |
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| the six places where food would travel: mouth, pharnyx, esophagus, stomach, intestine, anus. |
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| (liver) produces bile, breaks down fat. (Gallbladder) stores excess bile, pancreas produces and releases enzymes to break food down. |
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| filter-feeders that are commonly called sea-squirts. |
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| fish-like creature that lives on the sand ocean floor. |
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