Life in cold blood

an animal that has a backbone

an animal that can use body heat from chemical reactions in the body’s cells to maintain a constant body temperature

an organism that needs sources of heat outside of itslef

a faint line on both sides of a fish’s body that runs the length of the body and marks the location of sense organs that detect vibrations in the water

a respiratory organ in which oxygen from the water is exchanged with carbon dioxide from the blood

Hag fish,lampreys

skates,stingray

lungfish,masked butterfly fish,pikes

a gas-filled sac that is used to control buoyancy also known as a gas bladder

a respiratory organ in which oxygen from the air is exchanged with carbon dioxide from the blood.

the aquatic fish-shaped larva of a frog or toad

a phase in the life cycle of many animals during which a rapid change from the immature form of an organism to the adult form takes place

amphibian look like earth worms or snakes thin moist skin

amphibians long tail,4 strong legs

amphibian strong legs well developed ears smooth moist skin

amphibian strong legs well developed ears dry bumpy skin

a type of egg that is surrouneded by a membrane the amnion,and thta in reptiles,birds,and egg laying mammals.

streamlined shell that helps the turtle swim and turn rapidly

slow and inflexible

narrow head and a pointed snout

broad head and a rounded snout

carnivores special organs in the mouth

eat small insects and worms some eat plants

look like lizards no visible ear openings most active when temperature is low .