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Chapter 3 Vertebra:)

Swim Bladder An internal gas-filled organ that helps a boney fish stabilize its body at different water depths.
Buoyant Forces The force that water exerts upward on any underwater object.
Fish An ectothermic vertebrate that lives in the water and has fins.
Chordate The phylum whose members have notochords, a nerve chord, and slits in their throat area at some point in their lives.
Notochord A flexible rod that supports a chordate's back.
Endotherm An animal whose body controls and regulates its temperature by controlling the internal heat it produces.
Cartilage A flexible, strong tissue that is softer than bone.
Vertebra(e) The bones that make up the back bone of an animal.
Ectotherm An animal whose body does not produce much internal heat.
Amphibian An ectothermic vertebrate that spends its early life in water and its adulthood on land, returning to water to reproduce.
Urine The watery fluid in which the waste produced by an animal's cells are excreted.
Ventricle The lower chamber of the heart, which pumps blood out to the lungs and body.
Sedimentary Rock rocks formed from hardened layers of sediments-particlesof clay, sand, mud, or silt.
Reptile An exothermic vertebarte that has lungs and scaly skin.
Paleotologist A scientist who studies extinct organisms, examines fossil structures, and makes comparisons to present-day organisms
Habitat the specific environment in which an animal lives.
Fossil The hardened remains or ather evidence of a living thing that existed a long time in the past.
Atrium an upper chamber of the heart.
Created by: rasahdog101