Majors animal: External anatomy of the shark (matching)
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| Eyes | Large, image-forming sight organs with immovable eyelids
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| Nostrils | Paired openings on the ventral surface of the head leading to olfactory receptors
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| Mouth | Subterminal opening to digestive tract; lined with razor-sharp teeth
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| Spiracles | Paired openings on the dorsal surface of the head that function as modified gill slits allowing water to be drawn into the pharynx and across the gills
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| External gill slits | Five pairs of openings along the sides of the head that allow the release of water
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| Pectoral fins | Steering and braking while swimming and maintenance of dorsal-ventral orientation
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| Pelvic fins | Steering while swimming
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| Anal fin | Steering while swimming; located near the anus
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| Caudal fin | Provides thrust and acts as a rudder while swimming
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| Dorsal fins | Steering and maintenance of dorsal-ventral orientation while swimming; located on the dorsal surface
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| Abdominal pores | Paired openings near the cloaca; the function of which is unclear
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| Lateral lines | Specialized sensory organs that detect vibrations and current disturbances as well as weak electrical fields in the water; used for navigation and prey capture
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