Chapter 10, Problem 4A

Summary Introduction

Introduction:

All living things need oxygen to survive. Without it no organism that directly or indirectly needs oxygen can be alive and since all the living organisms consume food in the terms of glucose or any other carbohydrates or proteins or fats so they generate carbon dioxide too on the digestion of the food. As carbon dioxide is not useful for our body so it must be eliminated out of our body. Due to this reason exchange of gases take place.