VBSC 421 Lab Exam 2 (#9 external
anatomy and integument)
heterocercal caudal fin/tail - ANS-shark; produce thrust for forward movement
Dorsal Fins - ANS-shark; anterior and posteroir; produce thrust
Rostrum - ANS-shark; nose area
ampullae of lorenzi - ANS-sharks; associated with lateral line system; highly sensitive
sense organs, function as electroreceptors and thermometers
cloaca - ANS-shark and mudpuppy; common space where digestive, urinary, and repro
systems open
urogenital papilla - ANS-male shark; through which sperm and urine pass
urinary papilla - ANS-female shark; through which urine passes
spiracle - ANS-shark; modified first gill slit; dorsal to eye and between jaws and hyoid
gill slits - ANS-shark (5); respiratory apparatus
openings of endolymphatic ducts - ANS-shark; dorsally to spiracle; associated with
inner ear and involved in balance
lateral line - ANS-shark and mudpuppy; extensive system of pores arranged over
surface of head and lateral surface of body; functions as mechanoreceptors to detect
water currents
placoid scales - ANS-shark; remnants of ancestral bony armor embedded in dermis;
dentin, Enamel, pulp cavity
dentin - ANS-shark; part of placoid scales; bonelike material creating bulky base of
scale
enamel - ANS-shark; part of placoid scales; thin layer of bonelike material on top of
dentin
anatomy and integument)
heterocercal caudal fin/tail - ANS-shark; produce thrust for forward movement
Dorsal Fins - ANS-shark; anterior and posteroir; produce thrust
Rostrum - ANS-shark; nose area
ampullae of lorenzi - ANS-sharks; associated with lateral line system; highly sensitive
sense organs, function as electroreceptors and thermometers
cloaca - ANS-shark and mudpuppy; common space where digestive, urinary, and repro
systems open
urogenital papilla - ANS-male shark; through which sperm and urine pass
urinary papilla - ANS-female shark; through which urine passes
spiracle - ANS-shark; modified first gill slit; dorsal to eye and between jaws and hyoid
gill slits - ANS-shark (5); respiratory apparatus
openings of endolymphatic ducts - ANS-shark; dorsally to spiracle; associated with
inner ear and involved in balance
lateral line - ANS-shark and mudpuppy; extensive system of pores arranged over
surface of head and lateral surface of body; functions as mechanoreceptors to detect
water currents
placoid scales - ANS-shark; remnants of ancestral bony armor embedded in dermis;
dentin, Enamel, pulp cavity
dentin - ANS-shark; part of placoid scales; bonelike material creating bulky base of
scale
enamel - ANS-shark; part of placoid scales; thin layer of bonelike material on top of
dentin
