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34 Cards in this Set
- Front
- Back
super class of jawless vertebrates, no scales or paired fins lack vertebrae
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Agnatha
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larval form after egg of lamprey. Much different from adult. After 4-7 years, it changes into adult.
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ammocoete
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feature of chordates. supplies most of the propulsive force in swimming.
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caudal fin
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attaches caudal fin. provides most of the forward propulsion in sharks and other fishes
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caudal peduncle
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few large, plate like teeth. have upper jaws fused to skull.
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chinaeras
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fishes with cartilaginous skeletons. no swim bladder or lung, spiral valve in intestine. Male with pelvic claspers. Teeth not fused to jaw.
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Chondrichthyes
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behind pelvic fin, transfers sperm from cloaca into oviduct of female.
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clasper
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receives feces and gametes.
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cloaca
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have lungs, lobed pectoral fins. spiral valve in intestine.
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coelacanth
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when the caudal fins taper posterially to a point.
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diphycercal
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jawless fish in class myxini. use toothed like snail radulas for tongues to burrow into carcass and feed from within.
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hagfish
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fins with lobes of different sizes. can change the direction of thrust for diving climbing or turning.
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heterocercal
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canal lying beneath the lateral line and curving around the head. Made up of several receptors detecting electrical activity of prey.
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lateral line organ
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subclass dipheusti. have one or two lungs with which they can breath air.
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lungfish
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rectangular cases which eggs of rays are released within.
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mermaids purse
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sperm are transported to cloaca from testis via ----------- which also drain kidneys.
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mesonephric ducts
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kidney in adult fishes. develop into epididymis, vas deferens, of secondary importance in receiving feces and gametes.
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mesonephric kidney
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mechanoreceptors
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neuromasts
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maintainence of an overall density that is nearly the same as that of the water
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neutral buoyancy
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lampreys use to bore through the skin to feed on blood
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oral disc
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urea and methylamines-retained in high concentrations in body fluid, where they serve as osmolytes that help maintain an osmotic concentration comparable to that of the surrounding water.
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osmolytes
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respond to gravity and low-frequency sound
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otolith organ
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eggs are enclosed w/in a tough capsule in which the embryo develops externally
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oviparous
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egg is retained inside oviduct during hatching, w/out any other support from mother
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ovoviviparous
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have backward pointing spines that reduce hydrodynamic drag in water.
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placoid scale
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pelagre sharks use in which water is forced into open mouth and past hte gills and out operculi.
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ram ventilation
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ions that tend to acumulate in the body fluids from the environment are excreted mainly by the ------------.
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rectal glands
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sucking mouth, nasal sac not connected to pharynx , seen prs. of gill pouches.
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sea lamprey
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inside inner ears of sharks, sense acceleration of the body
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semicircular canals
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cavity which water flows through when mouth is closed
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spiracles
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in intestine, slows the passage of food and increases the surface area for digestion and absorption
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spiral valve
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sharks use to maintain neutral buoyancy, low density fat found in large liver
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squalene
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toxic compound to amocoetes, damages gills
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TFM
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born alive
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viviparous
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