Fish, Reptiles, and Amphibians Vocabulary

18 terms by gabetiberiuscolombo

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chordates

members of the chrodate phylum who have a notochord, a nerve chord, and slits in their throat area at some time in their lives

notochord

a flexible rod that supports the animal's back

cartilage

a connective tissue that is softer than bone, but flexible and strong

vertebrae

many similar disc-shaped bones that form the backbone

ectotherm

an animal whose body does not produce much internal heat

endotherm

an animal whose body controls and regulates its temperature by controlling the internal heat it produces

fish

a vertebrate that lives in water and has fins

swim bladder

and internal gas-filled sac that helps the fish stabilize its body at different depths

buoyant force

the force that water exerts upward on any underwater object

amphibian

an ectothermic vertebrate that spends its early life in water

atria

two upper chambers of the heart

ventricle

two lower chambers of the heart which pump blood out to the to the lungs and body

habitat

a specific environment in which an animal lives

reptile

an ectotherminc vertebrate that has lungs and scaly skin

urine

a watery fluid that wastes are excreted in

fossil

the hardened remains or other evidence of a living thing that existed a long time in the past

sedimentary rock

the type of rock made of hardened layers of sediments--clay, sand, mud, or silt

paleontologists

the scientists who study extinct organisms

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