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BIOL212

Majors animal: External anatomy of the shark (matching)

AnatomyPhysiology
Eyes Large, image-forming sight organs with immovable eyelids
Nostrils Paired openings on the ventral surface of the head leading to olfactory receptors
Mouth Subterminal opening to digestive tract; lined with razor-sharp teeth
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
External gill slits Five pairs of openings along the sides of the head that allow the release of water
Pectoral fins Steering and braking while swimming and maintenance of dorsal-ventral orientation
Pelvic fins Steering while swimming
Anal fin Steering while swimming; located near the anus
Caudal fin Provides thrust and acts as a rudder while swimming
Dorsal fins Steering and maintenance of dorsal-ventral orientation while swimming; located on the dorsal surface
Abdominal pores Paired openings near the cloaca; the function of which is unclear
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
Created by: scandalouscanine