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Science Notes

Chordate The phylum whose members have a notochoord, a nerve cord and slits in throat area.
Notochord A flexible rod that supports a chordates back.
Cartilage A fllexiable tissue that is softer than bone.
Vertebrae The bones that make up the backbone of an animal.
Ecttotherm An animal whose body does not produce much internal heat.
Endotherm An animal whose body controls and regulates its tempurature by controlling the internal heat it produces.
Fish An ectothermic vertebrate that lives in the water and has fins
Swim Bladder An internal gas-filled organ that helps a bony fish stabilize its body at different water depths.
Buoyant Force The force that water exerts upward on any underwater object.
Amphibian An ectothermic invertebrste that spends its early life in the water and its adulthood on land, returnig to the water to reproduce.
Atrium An upper chamber of the heart.
Ventricle The lower chamber of the heart, which pumps blood out to the lungs and body.
Habitat The specific envirement in which an aniaml lives.
Reptile An exothermic vertebrate that has lungs and scaly skin
Urine The watery fluid in which the wastess produced by an animal's cells are excerted.
Fossil The hardended remains or other evidence of a living thing that existed a long tome in the past.
Sedimentary Rock Rock formed from hardened layers of sediment- particlesof clay, maud, or silt.
Paleontologist A scientist who studies extinct organisms, examines fossil structures, and makes comparisons to present-day organisms.
Created by: hp8130