| A | B |
|---|
| chordate | an orgamism which has both a notochord and gill slits near the throat at the same time at one point in their life |
| vertebrate | an organism that has a backbone |
| ectotherm | an animal whose body does not produce much internal heat |
| endotherm | an animal who regulates it's own tempature by controlling the internel heat it produces |
| cartilage | a tissue that is more flexible than bone |
| amphibian | a vertebre that is ectothermic and spends its early life in water, later in life it can be either in water, or on land |
| tadpole | the earliest stage of a frog |
| lungs | organs that oxygen and gas and carbon-dioxide are exchanged between the air and blood |
| atria | the two upper chambers of the heart that recive blood |
| ventricle | the lower chamber of the heart |
| habitat | the spacific enviornment in which an animal lives |
| reptile | an ectothermic vertebrethat has lungs and scaly skin |
| kidneys | organs that filter waste from the blood |
| amniotic egg | an egg with a shell and internal mambranes that keep the embryo moist |
