http://www.ck12.org Chapter 1. Human Biology
Breathing and Respiration
The process of getting oxygen into the body and releasing carbon dioxide is calledrespiration. Sometimes breathing
is called respiration, but there is much more to respiration than just breathing. Breathing is only the movement of
oxygen into the body and carbon dioxide out of the body. The process of respiration also includes the exchange of
oxygen and carbon dioxide between the blood and the cells of the body.
Vocabulary
- alveoli: Tiny sacs in the lungs where gas exchange takes place.
- diaphragm: Sheet of muscle that spreads across the bottom of the rib cage.
- exhalation: Pushing air out of the body through the nose or mouth.
- inhalation: Taking air into the body through the nose or mouth.
- respiration: Process of getting oxygen into the body and releasing carbon dioxide.
Summary
- The diaphragm and rib muscles contract when you inhale and relax when you exhale.
- The process of getting oxygen into the body and releasing carbon dioxide is called respiration.
Practice
Use the resource below to answer the questions that follow.
- Respiration-Ventilationat http://www.youtube.com/watch?v=HiT621PrrO0 (1:44)
MEDIA
Click image to the left for more content.- What causes air to enter the lung?
- What happens at the alveolar sacs? Be thorough and complete in your answer.
- What is the function of the epiglottis? Where is it located?
Review
- In what part of the lung does gas exchange occur?
- What is the difference between breathing and respiration?