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Flashcards in chapter 41 Deck (20):
1

vertebrates are

chordates

2

vertebrates have what 3 characteristics

vertebrae
cranium
endoskeleton

3

class of jawless fishes

agnatha

4

class of sharks and rays

chondrichthyes

5

class of bony fishes

osteichthyes

6

oldest known vertebrates are

jawless fishes

7

fishes have __________ bodies and most have___________

streamlined
paired fins

8

fishes float by means of a _______ or ______ in the body

swim bladder
lipids

9

fishes use ___________ for respiration in the water.

gills

10

the _________ and_________ help fishes maintain homeostasis

kidney and gills

11

modern jawless fishes lack ___________ and ____

paired fins
jaws

12

lampreys are _________

external parasites

13

hagrishes feed on ___________ or on ______ or _________ fishes

invertebrates
dead
dying

14

sharks can ________, _____________ , and ________ _______ to detect prey

smell
see
detect

15

___________ and _______ are flattened bottom dwellers

rays
skates

16

characteristics of bony fishes are ______ on the body, ________ or a ______, and ________ in the skeleton

scales
lungs
swim bladder
bone

17

fishes use their fins for _________,________, and _______

propulsion
maneuvering
stability

18

the digestive system of a fish consists of a _______,________,_____,_____,_______,______,_____,_____,and _____

mouth
pharynx
esophagus
stomach
intestine
liver
gallbladder
panceras
anus

19

the fish heart has what

sinus venosus, atrium, ventricle, and conus arteriosus

20

fertilization is _________in most bony fishes and _____ in some species

external
internal