Chapter 31, Problem 2PIT

Summary Introduction

To add:

${\text{O}}_{\text{2}}$ and ${\text{CO}}_{\text{2}}$ to the concept map and connect these terms with body cells, blood, and alveoli.

Concept introduction:

The goal of breathing is to deliver oxygen to the body and to take away carbon dioxide. The lungs are the main organs of the respiratory system. The red blood cells are responsible for picking up the oxygen in the lungs and carrying the oxygen to all the body cells that need it.