About This Chapter
Human Respiratory System - Chapter Summary
Without oxygen, our brains can't work, so the human respiratory system is one of the most vital systems to our existence. These lessons provide a thorough analysis of the different parts and functions of the respiratory system.
To make sure you are retaining the information in the chapter, try answering the questions in the lesson quizzes. You have the ability to access these quizzes before or after you review a lesson. Each quiz contains several questions that allow you to choose the best possible answer. You can use any Internet-ready device to take the quiz, or you can print the quiz worksheets.
Study this chapter carefully so that you will be ready to do the following:
- Map out the respiratory zones of the lungs and airway
- Name the functions of the pleural membranes and cavities
- Describe how ventilation muscles cause expiration and inspiration
- Identify gas exchange efficiency and the respiratory surface
- Analyze ventilation and pulmonary surfactant function
- Check out the partial pressure gradients and diffusion of the gas exchange
- Define the process of internal and external respiration
- Examine the different factors affecting gas transport in the body
- Discuss how the blood transports carbon dioxide
- Point out ways in which ventilation is regulated
1. Gross Anatomy of the Airway and Lungs: Conducting & Respiratory Zones
The respiratory system includes the lungs as well as other organs that help to get oxygen into the blood and carbon dioxide out of the blood. The conducting zone of the respiratory system carries oxygen into the lungs and carbon dioxide out of the lungs. The respiratory zone is where oxygen and carbon dioxide move into and out of the blood.
2. Function of Pleural Cavities and Pleural Membranes
Each lung is contained within a pleural cavity, the space between the outside of the lung and inside of the chest wall. Pleural membranes cover the outside of the lungs and line the inside of the chest wall. The lungs remain expanded when we breathe due to a vacuum effect within the pleural cavity.
3. How Ventilation Muscles Cause Inspiration and Expiration
What is ventilation? It includes both inspiration and expiration, the movement of air into and out of our lungs. In this lesson, learn about how the diaphragm contracts and relaxes and its impact on lung volume.
4. The Respiratory Surface and Gas Exchange Efficiency
The respiratory membrane includes millions of alveoli with a surface area as large as a tennis court. This large respiratory surface area, combined with other factors, makes for efficient gas exchange to meet our metabolic needs.
5. External and Internal Respiration in the Lungs: Definition & Process
This lesson explores the process by which oxygen and carbon dioxide get into and out of the blood located in the lungs and in our metabolizing tissues. The partial pressure gradient for each gas determines both the direction and rate of diffusion across the respiratory membrane.
6. Gas Transport: Oxygen and Hemoglobin
Did you know that almost all of the oxygen transported in our blood is bound to hemoglobin? Hemoglobin is loaded with oxygen in the lungs and unloaded of oxygen in the metabolizing tissues. This lesson will describe how oxygen is transported in our blood.
7. Gas Transport: Cooperative Binding of Oxygen with Hemoglobin
Our cells need oxygen. Most of the oxygen is delivered to our cells bound to hemoglobin. This lesson describes how cooperative binding of hemoglobin maximizes oxygen delivery to our metabolizing tissues.
8. Gas Transport: Effect of Temperature, pH & Metabolism
Hemoglobin carries almost all the oxygen to our metabolizing tissues. This lesson discusses physiological factors that stimulate hemoglobin to unload oxygen in our tissues. For example, temperature, carbon dioxide, pH and metabolism all influence the affinity of hemoglobin for oxygen.
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Other chapters within the Biology 105: Anatomy & Physiology course
- Anatomy and Physiology Overview
- Chemical and Cellular Biology
- Tissue Biology
- Integumentary System
- Skeletal System
- Muscular System Anatomy
- Muscular System Physiology
- Introduction to the Human Nervous System
- The Central Nervous System in the Human Body
- The Peripheral Nervous System
- The Five Senses
- The Endocrine System
- The Human Cardiovascular System - Blood & Heart
- The Human Cardiovascular System - Vessels & Circulation
- The Lymphatic System & Immunity
- Digestive System
- Urinary System
- Male and Female Reproductive Systems
- Studying for Biology 105