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28 terms

Life Science Chapter 11 CRA

Reptiles, Amphibians & Fish
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chordate
the phylum whose members have a notochord, a nerve chord, and pouches in their throat area at some point in their lives
notochord
a flexible rod that supports a chordates back
vertebra
the backbone that is formed by many similar bones
endotherm
an animal whose body regulates its own temperature by controlling the internal heat it produces
ectotherm
an animal whose body does not produce much internal heat. Its body temperature changes depending on the temperature of its environment
fish
a vertebrate that lives in water and uses fins to move. They are ectotherms, obtain oxygen through gills and have scales
cartilage
a tissue that is more flexible than bone
swim bladder
an internal, gas filled sac that helps the fish stay stable at different depths in the water
amphibian
a vertebrate that is ectothermic and spends its early life in water and its adult life on land
tadpole
the larval form of a frog or a toad
lung
an organ found in air-breathing vertebrates that exchanges oxygen and carbon dioxide with the blood
atrium
each of two upper chambers of the heart that receive blood that comes into the heart
ventricle
a lower chamber of the heart that pumps blood out to the lungs and body
habitat
the specific environment that provides the things an organism needs to live, grow and reproduce
reptile
an ectothermic vertebrate that lays eggs and has lungs and scaly skin
urine
a watery fluid produced by the kidneys that contains urea and other wastes
kidney
a major organ of the excretory system that removes urea and other wastes from the blood
amniotic egg
an egg with a shell and internal membranes that keep the embryo moist
fossil
the preserved remains or traces of an organism that lived in the past
sedimentary rock
rock formed of hardened layers of sediments
paleontologist
a scientist who studies extinct organisms, examines fossil structure, and makes comparisons to present-day organisms
cartilaginous fish
fish that have jaws and scales, and skeletons made of cartilage. ex. sharks, rays and skates
bony fish
fish that have jaws, scales, a pocket on each side of the head that holds gills, and a skeleton made of hard bones. ex. trout, tuna, gold fish
jawless fish
fish that have no jaws and no scales. ex. hagfish and lamprey eels
lizzard and snakes
reptiles that have skin covered with overlapping scales, as they grow they shed their skin and scales. Most live in warm areas
alligators
are large carnivorous reptiles that care for their young and have broad, rounded snouts with only a few visible teeth when their mouth is shut
crocodiles
are large carnivorous reptiles that care for their young and have pointed snouts, with most of their teeth showing when their mouth is shut.
turtle
a reptile whose body is covered by a protective shell that includes the ribs and backbone