1. Chordate Notochord Vertebra Ectotherm Endotherm
Phylum whose members have a notochord, nerve cord and a pouch in their throat
Notochord
A flexible rod that supports a chordate’s back
Vertebra
Small bones that make up the backbone
Ectotherm
An animal whose body does not produce much heat
Endotherm
An animal whose body controls and regulates its temperature by cooling the internal heat it produces

2. Fish Cartilage Swim Bladder Amphibian Tadpole
An ectothermic vertebrate that lives in water and has fins
Cartilage
A connective tissue, more flexible than bone that protects the ends of bones
Swim Bladder
An internal gas filled organ that helps bony fish stabilize their bodies at different depths
Amphibian
An ectothermic vertebrate that spends its early life in water and adult life on land
Tadpole
The larval form of a frog or toad

3. Lung Atrium Ventricle Habitat Reptile
An organ found in air breathing vertebrates that exchanges oxygen and carbon dioxide in the blood
Atrium
The two upper chambers of the heart
Ventricle
The lower chamber of the heart
Habitat
The specific environment that provides the things an organism needs to live, grow and reproduce
Reptile
An ectothermic vertebrate that lays eggs, has lungs and scaly skin

4. Kidney Urine Amniotic Egg Fossil Sedimentary Rock
Major organ of the excretory system that removes urea and wastes from the blood
Urine
Watery fluid produced by the kidneys that contains urea and other wastes
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 from hardened layers of sediment

5. A scientist who studies extinct organisms
Paleontologist
A scientist who studies extinct organisms