Respiratory System

Respiratory System

The job of the respiratory system is the exchange of gases between the body and the outside air. This process, called respiration, actually consists of two parts. In the first part, oxygen in the air is drawn into the body and carbon dioxide is released from the body through the respiratory tract. In the second part, the circulatory system delivers the oxygen to body cells and picks up carbon dioxide from the cells in return. The use of the word respiration in relation to gas exchange is different from its use in the term cellular respiration. Recall that cellular respiration is the metabolic process by which cells obtain energy by “burning” glucose. Cellular respiration uses oxygen and releases carbon dioxide. Respiration by the respiratory system supplies the oxygen and takes away the carbon dioxide. 

In Chapter 15, students will explain

the four steps in respiration

the mechanism of breathing (inspiration/expiration)

processes by which O2 and CO2 exchange occur with the blood

and identify causes & symptoms of respiratory infections

Instructions - complete the following

1. Read Inquiry into Life text pg 281-300 or Digital Book p252-261.

2. Lessons

Lesson 1 - Introduction to the Respiratory System

Lesson 2 - Oxygen & Carbon Dioxide Exchange

3. Notes - the Respiratory System
   
   

4. Chapter Package - Download
   
   

5. Observe the following animations

Lung Anatomy

Alveoli

External Respiration - Inhalation/Exhalation Process

Partial Pressures pO2 & pCO2 - Alveolar Gas Exchange

Spirometry - measuring lung capacity

Waste Exchange, Dissolved CO2, HCO3/H2CO3, carbonic anhydrase