Cold-Blooded Vertebrate Flashcards
Vertebrates
an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
Endotherms
an animal that is dependent on or capable of the internal generation of heat; a warm-blooded animal.
Ectotherms
an animal that is dependent on external sources of body heat.
Lateral Line
a visible line along the side of a fish consisting of a series of sense organs which detect pressure and vibration.
Gills
the paired respiratory organ of fishes and some amphibians, by which oxygen is extracted from water flowing over surfaces within or attached to the walls of the pharynx.
Jawless Fishes (2 examples)
are part of the the superclass Agnatha.
Cartilaginous Fishes (3 examples)
are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.
Bony Fishes (3 examples)
The third type of fish, including eels and hagfish, is the group known as Agnatha, or jawless fish.
Swim Bladder
a gas-filled sac present in the body of many bony fishes, used to maintain and control buoyancy.
Amphibians
a cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, and salamanders.
Lungs
each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed.
Tadpole
the tailed aquatic larva of an amphibian (frog, toad, newt, or salamander), breathing through gills and lacking legs until the later stages of its development.
Metamorphosis
the process of transformation from an immature form to an adult form in two or more distinct stages.
Caecilians (description)
are a group of limbless, serpentine amphibians.
Salamanders (description)
are a group of amphibians typically characterized by a lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All present-day salamander families are grouped together under the order Urodela.