The document summarizes gas exchange and respiration in various organisms. It describes how oxygen is taken up and carbon dioxide is released in aquatic animals like fish and insects, and terrestrial animals like mammals. It focuses on the mammalian respiratory system, including the roles of the lungs, alveoli, and diaphragm in breathing. It also discusses control of breathing centers in the brain and how respiratory pigments like hemoglobin transport oxygen and carbon dioxide in the blood.
![HBS Project ,[object Object],Melia Ungson, Kioma Palkhivala, Aviva Prager, Carina Coffey](https://image.slidesharecdn.com/hbsproject2-1193558317477470-5/85/Hbs-Project2-1-320.jpg)
![Gas Exchange ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)