chapter 41 Flashcards
vertebrates are
chordates
vertebrates have what 3 characteristics
vertebrae
cranium
endoskeleton
class of jawless fishes
agnatha
class of sharks and rays
chondrichthyes
class of bony fishes
osteichthyes
oldest known vertebrates are
jawless fishes
fishes have __________ bodies and most have___________
streamlined
paired fins
fishes float by means of a _______ or ______ in the body
swim bladder
lipids
fishes use ___________ for respiration in the water.
gills
the _________ and_________ help fishes maintain homeostasis
kidney and gills
modern jawless fishes lack ___________ and ____
paired fins
jaws
lampreys are _________
external parasites
hagrishes feed on ___________ or on ______ or _________ fishes
invertebrates
dead
dying
sharks can ________, _____________ , and ________ _______ to detect prey
smell
see
detect
___________ and _______ are flattened bottom dwellers
rays
skates
characteristics of bony fishes are ______ on the body, ________ or a ______, and ________ in the skeleton
scales
lungs
swim bladder
bone
fishes use their fins for _________,________, and _______
propulsion
maneuvering
stability
the digestive system of a fish consists of a _______,________,_____,_____,_______,______,_____,_____,and _____
mouth pharynx esophagus stomach intestine liver gallbladder panceras anus
the fish heart has what
sinus venosus, atrium, ventricle, and conus arteriosus
fertilization is _________in most bony fishes and _____ in some species
external
internal
