boneless
chordates
anatomy
reproduction
7 Functions
100
a fish having a skeleton composed complete of cartilage.
What is the definition of a chondrichthyes?
100
dorsal
where is the notochord located at? ventral or dorsal side?
100
cerebellum
What coordinates body movement?
100
viviparous fish
What is the type of fish reproduces through internal fertilization?
100
exchanging gases so that fish may respire..
what is gills used for?
200
sharks,rays,and skates.
what are 3 examples of chondrichthyes???
200
1.a dorsil 2.hollow nerve cord 3.a notochord 4.pharyngeal pouches
What are the four key characteristics of a chordate?
200
olfactory bulb
What primarily processes the sense of smell in fishes?
200
external
What is the method by which oviparous fish fertileze their eggs?
200
kidneys.
What is the organ that helps fishes control the amount of water in their body?
300
toothlike scales.
What is found inside a sharks mouth as well as on its skin?
300
vertebrates
what are most chordates?
300
friction.
a streamlined body shapes helps reduce ________ in fishes as they move through water.
300
anadromous fishes.
What type of fish live their lives on fresh water but migrate to the ocean to breed?
300
they concentrate waste and return as much water as possible to the body.
What is the kidneys of marine fishes unique function?
400
20,000 teeth.
What is the amount of teeth that a shark goes through its life time??
400
tunicates and lancelets.
What are two groups of nonvertebrate chordates?
400
swim bladder.
What is a gas filled organ that adjusts fishes buoyancy?
400
salmon
What fish after four years of life in the ocean returns to their homeland to breed in fresh water?
400
closed circulatory system.
What is the type of circulatory system that fish have?
500
rays and skates.
What relative of sharks spend a vast majority of their time covered in sand lying on the ocean floor?
500
pharyngeal pouches
What has paired structures in the throat region?
500
tail
What contain bone and muscle and is used in swimming by many aquatic species?
500
oviparous.
What is the stage in which embryos develop inside the mothers body using the egg yolk for nourishment?
500
to detect gentle currents and vibrations in the water.
What is the lateral line system used for in fishes?
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