Vocabulary Review Ch 41 - Reptiles. One of a varied group of mostly extinct reptiles that lived from about 235 million years ago to about 66 million years.
Ch 20 Respiratory System. The respiratory system is where gas exchange occurs. –picks up oxygen from inhaled air –expels carbon dioxide and water nose.
By: Jake Skelly Brooke Vanlacken Aldiana Huskic McKayla Drappeaux.
Ch 20
Respiratory System
